Hurricane Info

Defining Hurricanes & Tropical Storms

The following is a list of terms relevant to hurricanes and tropical storms. If a storm threatens the Charleston County area and you are either required or feel the need to evacuate, please see Evacuation below.

Tropical Storm

Once winds within tropical system reach 39 mph and the distinct low pressure area is well defined by a rotating circulation, the system is considered a tropical storm and is given a name.

Hurricane

A Tropical Storm that has sustained winds exceeding 74 mph or greater, dangerously high water and rough seas.

Hurricane Watch

A Hurricane Watch is issued when hurricane conditions are a real possibility for an area within 48 hours. For a list of tasks to complete during a Hurricane Watch, see the Hurricane Facts below.

Hurricane Warning

A Hurricane Warning is issued when a hurricane is expected within 36 hours. Begin precautionary action at once. For a list of tasks to complete during a Hurricane Warning, see the Hurricane Facts below.

Information compiled from the Federal Emegency Management Agency.

Hurricane Facts - Before, During, and After

Hurricanes can be dangerous killers. Learning the hurricane warning messages and planning ahead can reduce the chances of injury or major property damage. Read below to learn specific information to prepare you for each phase of the storm.

Before The Storm

Check into flood insurance. You can find out about the National Flood Insurance Program through your insurance agent or the Emergency Management Department. There is normally a 30-day waiting period before a new policy becomes effective. Homeowners polices do not cover damage from the flooding that accompanies a hurricane.

Develop an emergency communication plan. In case family members are separated from one another during a disaster (a real possibility during the day when adults are at work and children are at school), have a plan for getting back together.

Ask an out-of-state relative or friend to serve as the "family contact." After a disaster, it's often easier to call long distance. Make sure everyone in the family knows the name, address and phone number of the contact person.

Make sure that all family members know how to respond after a hurricane. Teach family members how and when to turn off gas, electricity, and water.

Teach children how and when to call 9-1-1, police, or fire department and which radio station to tune to for emergency information.

Prepare window protection methods. Permanent shutters are the best protection. A lower-cost approach is to put up plywood panels. Use 1/2 inch plywood (marine plywood is best) cut to fit each window. Remember to mark which board fits which window. Pre-drill holes every 18 inches for screws. Do this long before the storm.

During A Hurricane Watch
  • Review your family disaster plan and check your Emergency Supplies Kit to include food and water supplies. Other supplies may include:
    • Flashlight and extra batteries
    • Portable, battery-operated radio and extra batteries
    • First aid kit and manual
    • Emergency food and water
    • Nonelectric can opener
    • Essential medicines
    • Cash and credit cards
    • Sturdy shoes
  • Review evacuation plans. Learn safe routes inland and plan your evacuation route. Be ready to drive 20 to 50 miles inland to locate a safe place.
  • Make sure the gas tank in your car is full.
  • Make arrangements for pets, i.e. pet friendly shelters (see Shelters )
  • Refill prescription medications.
  • Anchor or stow small boats.
  • Bring in outdoor objects such as lawn furniture, toys and garden tools; anchor objects that cannot be brought inside.
  • Remove outside antennas.
  • Secure buildings by closing and boarding up windows.
  • Turn refrigerator and freezer to coldest settings. Open only when absolutely necessary and close quickly.
  • Store drinking water in clean bathtubs, jugs and bottles.
  • Trim back dead or weak branches from trees.
  • Stay tuned to local media and your Weather Alert Radio for updates on the storm.
During A Hurricane Warning
  • Store valuables such as jewelry, silverware and scrapbooks in a safe place, i.e. waterproof container on the highest level of your home.
  • Park your car in a sheltered area or on high ground.
  • Listen constantly to a battery-operated radio or television for official instructions.
  • Remain calm and prepare to evacuate if the order is given.
  • If at home, stay inside away from windows, skylights and glass doors.
  • Keep a supply of flashlights and extra batteries handy. Avoid open flames, such as candles and kerosene lamps, as a source of light.
  • If power is lost, turn off major appliances to reduce power "surge" when electricity is restored.
  • If officials indicate evacuation is necessary:
    • Leave as soon as possible. Avoid flooded roads and watch for washed-out bridges.
    • Secure your home by unplugging appliances and turning off electricity and the main water valve.
    • Tell someone outside of the storm area where you are going.
    • If time permits, and you live in an identified surge zone, elevate furniture to protect it from flooding or better yet, move it to a higher floor.
    • Bring pre-assembled emergency supplies and warm protective clothing.
    • Take blankets and sleeping bags to shelter.
    • Lock up home and leave.
After The Storm
  • Stay tuned to local radio for information.
  • Help injured or trapped persons.
  • Give first aid where appropriate.
  • Do not move seriously injured persons unless they are in immediate danger of further injury. Call for help.
  • Return home only after authorities advise that it is safe to do so.
  • Avoid loose or dangling power lines and report them immediately to the power company, police or fire department.
  • Enter your home with caution.
  • Beware of snakes, insects and animals driven to higher ground by flood water.
  • Open windows and doors to ventilate and dry your home.
  • Check refrigerated foods for spoilage.
  • Take pictures of the damage, both to the house and its contents and for insurance claims.
  • Drive only if absolutely necessary and avoid flooded roads and washed-out bridges.
  • Use telephone only for emergency calls.
Inspecting Utilities In A Damaged Home

Check for gas leaks - If you smell gas or hear blowing or hissing noise, open a window and quickly leave the building. Turn off the gas at the outside main valve if you can and call the gas company from a neighbor's home. If you turn off the gas for any reason, it must be turned back on by a professional.

Look for electrical system damage - If you see sparks or broken or frayed wires, or if you smell hot insulation, turn off the electricity at the main fuse box or circuit breaker. If you have to step in water to get to the fuse box or circuit breaker, call an electrician first for advice.

Check for sewage and water lines damage - If you suspect sewage lines are damaged avoid using the toilets and call a plumber. If water pipes are damaged, contact the water company and avoid the water from the tap. You can obtain safe water by melting ice cubes.

Hurricane Preparedness Guide

You are responsible for your safety, and now is the time to get prepared. The Charleston County Hurricane Guide is filled with information about developing a family communications plan, creating an emergency supplies kit, protecting your home from damage, evacuation information and much more.

The guide is available in two formats: a standard page size for easy printing at home and a booklet for churches, groups and associations to hand out to their members.

Share the guide with your family, friends and neighbors.

Guides/Files
English
Español
Instructions For Creating Booklets
  1. Print the booklet one-sided on legal size paper.
  2. The printer will print the first and last pages on one sheet of paper; the second and next-to-last pages on another sheet of paper; and so on. They will appear out of order.
  3. Photocopy the pages back to back (double-sided) and then fold, staple or bind them together in the center. Once folded in the center, the pages will be in the correct order.

Avoiding Wind Damage

Once a tornado, hurricane or major storm hits, it's too late to protect your home and property. But there are things you can do now to limit future wind damage. Some are fairly simple and inexpensive; others will require a contractor. You'll need to consider the characteristics of your home, your financial resources and the building codes in your community.

This homeowner's checklist will help you learn what you can do. For more information about the costs and benefits of each approach, talk to a professional builder, architect or contractor. You should also ask the Building Services Department about building permit requirements.

If you're building or remodeling a home, there are many other ways to protect your property that are not addressed in this checklist. To learn more, talk to a professional home builder, architect, contractor or building supply retailer.

Do you know your risk?

Ask the Emergency Management Department or American Red Cross for information about the hazards in your community.

Has the garage door been properly secured?

If the garage door fails, winds can enter your home and blow out doors, windows, walls and the roof. Ask the Building Services Department for guidance on what to do.

Do you have enough insurance?

Even if you have taken steps to protect your home from flooding, you still need flood insurance if you live in a floodplain.

Homeowners' policies do not cover flood damage, so you will probably need to purchase a separate policy under the National Flood Insurance Program (NFIP).

It takes 30 days for a flood policy to take effect. This is why you need to purchase flood insurance before flooding occurs.

If your insurance agent is unable to write a flood policy, call (800) 638-6620 for information.

Is the roof sheathing properly installed?

During a windstorm, wind forces are carried from the roof down to the exterior walls, down to the foundation. Homes can be damaged when wind forces are not properly transferred to the ground.

Roof sheathing (the boards or plywood nailed to the roof rafters or trusses) can fail during a hurricane if not properly installed. Examine the sheathing from the attic. If many of the nails have missed the rafters, you may need to renail the sheathing. If you're putting on a new roof, make sure the sheathing complies with current recommended practices.

Are end gables securely fastened to the rest of the roof?

In a hurricane or other wind storm, the side walls of the roof (end gables) take a real beating and can collapse. Gable bracing often consists of 2"x4"s placed in an "X" pattern at both ends of the attic: from the top center of the end gable to the bottom of the brace of the fourth truss, and from the bottom center of the end gable to the peak of the roof.

Is the roof fastened to the walls with hurricane straps?

Hurricane straps (made out of galvanized metal) help keep the roof fastened to the walls in high winds. They can be difficult to install, so you may need a contractor for this project. Ask the Building Services Department whether hurricane straps are required or advisable in your area.

Are windows protected by storm shutters?

Installing storm shutters is one of the most effective ways to protect your home. Purchase or make shutters for all exposed windows, glass surfaces, French doors, sliding glass doors and skylights.

There are many types of manufactured storm shutters available made out of wood, aluminum or steel. You can also make storm shutters with 5/8-inch thick exterior-grade plywood.

Are double entry doors secured at the top and bottom?

The exterior walls, doors and windows are the protective shell of your home. If the shell is broken during a storm, high winds can enter the home and put pressure on the roof and walls, causing serious damage.

For each double door, at least one of the doors should be secured at both the top of the door frame and the floor with sturdy sliding bolts. Most bolts that come with double doors, however, are not strong enough to withstand high winds. Your local hardware can help you select the proper bolts. Some door manufacturers provide reinforcing bolt kits made specifically for their doors.

Avoiding Flood Damage

Do you know the projected flood elevation for your area?

Ask the Emergency Management Department or Building Services Department to see a flood map of your community. There may be a projected flood elevation for your neighborhood. This information will help you determine how much water is likely to come in.

Is the main electric panel board located above potential flood waters?

The main electric panel board (electric fuses or circuit breakers) should be at least 12" above the projected flood elevation for your home. The panel board height is regulated by code. All electrical work should be done by a licensed electrician.

Are the furnace and water heater above potential flood waters?

The furnace and water heater can be placed on masonry blocks or concrete at least 12" above the projected flood elevation, moved to inside a floodwall or moved to a higher floor. (You have more options for protecting a new furnace. Ask your utility about rebates for new energy efficient furnaces. The rebate plus the savings in fuel costs could make the purchase feasible.)

Furnaces that operate horizontally can be suspended from ceiling joists if the joists are strong enough to hold the weight. Installing a draft-down furnace in the attic may be an option if allowed by local codes. Some heating vents can be located above the projected flood elevation.

Outside air conditioning compressors, heat pumps or package units (single units that include a furnace and air conditioner) can be placed on a base of masonry, concrete or pressure-treated lumber. All work must conform to state and local building codes.

Are electric outlets and switches located above potential flood waters?

Consider elevating all electric outlets, switches, light sockets, baseboard heaters and wiring at least 12" above the projected flood elevation for your home. You may also want to elevate electric service lines (at the point they enter your home) at least 12" above the projected flood elevation. In areas that could get wet, connect all receptacles to a ground fault interrupter (GFI) circuit to avoid the risk of shock or electrocution. Have electrical wiring done by a licensed electrician.

Is the fuel tank anchored securely?

A fuel tank can tip over or float in a flood, causing fuel to spill or catch fire. Cleaning up a house that has been inundated with flood waters containing fuel oil can be extremely difficult and costly. Fuel tanks should be securely anchored to the floor. Make sure vents and fill-line openings are above projected flood levels. Propane tanks are the property of the propane company. You'll need written permission to anchor them. Be sure all work conforms to state and local building codes.

Does the sewer system have a backflow valve?

If flood waters enter the sewer system, sewage can back up and enter your home. To prevent this, have a qualified, licensed plumber install an interior or exterior backflow valve. Check with the Building Services Department for permit requirements.

Are the washer and dryer above potential flood waters?

For protection against shallow flood waters, the washer and dryer can sometimes be elevated on masonry or pressure-treated lumber at least 12" above the projected flood elevation. Other options are moving the washer and dryer to a higher floor, or building a floodwall around the appliances.

Does the floor drain have a float plug?

Install a floating floor drain plug at the current drain location. If the floor drain pipe backs up, the float will rise and plug the drain.

Flood Zones & Protection

How do I know in which flood zone a property is located?

Your local government can tell you in which flood zone your property is located. For unincorporated Charleston County, Awendaw, Kiawah Island, Meggett, and Rockville, contact the Charleston County Planning Department to obtain a flood zone determination. Flood zone determinations are available for property in other municipalities in Charleston County through the applicable municipality.

Flood Insurance Rate Maps for Charleston County are also available on-line at the Federal Emergency Management Agency (FEMA) map service center.

Is Charleston County potentially subject to hurricane storm surge flooding?

Charleston County has experienced many hurricanes and other severe storms throughout our history, the most recent of which were Hurricanes Hugo in 1989 and Hurricane Floyd in 1999. The greatest threat for flooding in the Charleston County area is from storm surge associated with a hurricane from the Atlantic Ocean.

What regulations apply to construction-related activities in Flood Zones?

The Charleston County Flood Damage and Prevention Ordinance mandates that certain procedures be followed for construction-related work within properties designated as flood zones on the Charleston County Flood Insurance Rate Maps. Copies of this ordinance are also available from the Charleston County Building Services Department upon request.

What do the flood zone designations on the Flood Insurance Rate Maps mean?

If a property within Charleston County is in one of the following flood zones:

Zone A:
No base flood elevations determined.
Zone AE:
Base flood elevations determined.
Zone AH:
Flood depths of 1 to 3 feet (usually areas of ponding); base flood elevations determined.
Zone AO:
Flood depths of 1 to 3 feet (usually sheet flow on sloping terrain); average depths determined. For areas of alluvial fan flooding, velocities also determined.
Zone A99:
To be protected from 100-year flood by Federal flood protection system under construction; no base flood elevations determined.
Zone V:
Coastal flood with velocity hazard (wave action); no base flood elevations determined.
Zone VE:
Coastal flood with velocity hazard (wave action); base flood elevations determined.
Shaded Zone X:
Areas of 500-year flood; areas of 100-year flood with average depths of less than 1 foot or with drainage areas less than 1 square mile; and areas protected by levees from 100-year flood.
Zone X:
Areas determined to be outside 500-year flood plain.
Zone D:
Areas in which flood hazards are undetermined, but possible.

Additional information regarding flood zones and flood insurance is available from the National Flood Insurance Program.

Can all properties in Charleston County get flood insurance?

Federally subsidized flood insurance is available through the National Flood Insurance Program for most properties located in Charleston County and its inclusive municipalities. Damage caused by flooding is not covered by a standard homeowner's insurance policy.

A separate flood insurance policy is required for flood peril coverage. Flood insurance is available for buildings only, contents only, or both buildings and contents. Insurance agents or the National Flood Insurance Program should be contacted for flood policy information. There is generally a 30-day waiting period for flood insurance policies to become effective. Charleston County currently has a few parcels of land that could potentially be developed located in "Coastal Barrier Resource Act" protected areas (COBRA zones).

Under Federal law, the National Flood Insurance Program may not issue flood insurance policies for structures built in COBRA zones. If flood insurance is available for structures built in COBRA zones, it will be through a private insurer.

Is there a limit to how much work can be done to an existing structure in an Flood Zone?

The National Flood Insurance Program requires that if the cost of reconstructing, rehabilitating, adding to, or otherwise improving a structure equals or exceeds 50 percent of the building's assessed or appraised value, then the building must meet the same construction requirements as a new building. An improvement of 50 percent or more to a structure is known as a "Substantial Improvement".

These requirements also apply to buildings that are substantially damaged; however, the value used in making the substantial improvement determination is the pre-damage value of the structure. In Charleston County and the jurisdictions for which it provides inspection-related services, the values of construction work on building permits taken out on a property during the past five (5) years are included in the determination of a "Substantial Improvement." This regulation is enforced through the construction permitting process.

Any questions regarding "Substantial Improvements" may be referred to the Building Services Department.

What are the special requirements for construction in "A, AE, AH, AO, A99" Flood Zones in Unincorporated Charleston County?
Flood Elevation Requirements:

The finished floor of all new and substantially improved residential structures must be elevated to a minimum of two feet above the base flood elevation indicated on the applicable flood insurance rate map. A flood elevation certificate indicating this elevation must be submitted prior to any building inspection except for a foundation inspection. This certificate must be of the latest version available.

Construction Materials Requirements:

Per FEMA, only Flood Resistant Materials Technical Bulletin 2 (Class 4 or 5 materials) are permitted to be used below the base flood elevation unless the structure is a floodproofed non-residential structure.

Floodproofing Requirements:

Only non-residential structures in all "A" flood zones may be floodproofed to a minimum of one foot above the base flood elevation in lieu of elevating the finished floor to this elevation. A pre-construction (prior to the plans being released for permit) and an as-built (prior to final building inspection) floodproofing certificate must be completed by a South Carolina registered Architect and/or Professional Engineer for all floodproofed buildings. Construction plans for floodproofed buildings must also be sealed by a South Carolina registered Architect and/or Professional Engineer.

Equipment Elevation Requirements:

With the exception of one electrical outlet and one switch on a Ground Fault Interrupter (as required to meet the National Electrical Code), there may be no electrical wiring, plumbing fixtures, mechanical fixtures, other equipment, appliances, or ductwork located within new or substantially improved structures below one foot above the base flood elevation. Replacement HVAC systems in all "A, AE, AH, AO, A99" flood zones must be located either at or above the existing finished floor elevation or the base flood elevation, whichever is lower, unless the property is undergoing a "Substantial Improvement," in which case the HVAC system must be elevated to or above one foot above the base flood elevation.

Flood Control Vent Requirements:

Enclosed areas below the base flood elevation (e.g. garages, sheds, crawl spaces, etc.) must be provided with flood control vents located and sized in accordance with FEMA requirements (e.g. a minimum of two (2) openings on different walls, located within a maximum of 12 inches of grade, sized at a minimum of one square inch per one square foot of enclosed area, with vents that allow the free-flow of flood waters at all times. If these specifications are not met, a South Carolina registered Architect or Professional Engineer must certify in writing that the structure is designed to comply with FEMA requirements regarding equilization of hydrostatic and hydrodynamic forces.

Permitted Uses Below Base Flood Elevation:

Permitted uses below the base flood elevation are restricted to those necessary for building access, vehicle parking, and limited storage of yard-related equipment.

Please refer to the Charleston County Flood Damage and Prevention Ordinance for more information.

How can I protect my property from flood-related damages?

The Federal Emergency Management Agency (FEMA) maintains an electronic library of reference materials on topics such as retrofitting structures for enhanced flood and hurricane resistance and protecting building utilities from flood damages. The Charleston County libraries also have multiple publications available in their reference sections on protecting property from flood damages.

Since Charleston County is subject to hurricanes, measures such as protecting glazed openings in your buliding against high wind damages should also be taken for property protection.

Where can I get information on safety measures for flooding?

The Charleston County Emergency Management Department has information available on safety measures for flooding and other hazard events. The Federal Emergency Management Agency also maintains an electronic library of resources on flood safety.

The SC Flood Mitigation Program office also provides information on flood safety. It is important to remember to not drive through flooded areas.

What are the special requirements for construction in "V and VE" Flood Zones in Unincorporated Charleston County?
Lowest Horizontal Member Elevation:

The lowest horizontal structural member of all new and substantially improved structures must be elevated to a minimum of one foot above the base flood elevation indicated on the applicable flood insurance rate map.

A flood elevation certificate indicating this elevation must be submitted prior to any building inspection, except for a foundation inspection. This certificate must be of the latest version available.

Construction Materials Requirements:

Per FEMA, only Flood Resistant Materials Technical Bulletin 2 (Class 4 or 5 materials) are permitted to be used below the base flood elevation.

Plan and Certificate Requirements:

Wall section and foundation plans for structures in "V or VE" flood zones must be designed and sealed by a South Carolina Registered Professional Engineer and/or Architect. Plans must detail breakaway wall construction, foundation design, and scour depth. If spread footings are used, the bottom of the footing must be a minimum of 12 inches below the anticipated scour depth at the structure location. Pre-construction "V-Zone design" and "V-Zone Breakaway wall" certificates must be submitted with the construction plans for review.

As-built "V-Zone design" and "V-Zone Breakaway wall" certificates must be submitted prior to a final building inspection. Obtain copies of these certificates from the Charleston County Building Services Department.

Equipment Elevation Requirements:

With the exception of one electrical outlet and one switch on a Ground Fault Interrupter (as required to meet the National Electrical Code), there may be no electrical wiring, plumbing fixtures, mechanical fixtures, other equipment, appliances, or ductwork located within new or substantially improved structures below the design flood elevation (base flood elevation plus freeboard).

Replacement HVAC systems in all special flood hazard areas (flood zones) must be located either at or above the existing finished floor elevation or the design flood elevation, whichever is lower, unless the property is undergoing a "Substantial Improvement," in which case the HVAC system must be elevated to or above the design flood elevation.

Permitted Uses Below the Flood Elevation:

Permitted uses below the design flood elevation are restricted to those necessary for building access, vehicle parking, and limited storage of yard-related equipment.

Walls Below the Base Flood Elevation:

All walls below the design flood elevation in a V or VE flood zone must be designed and certified by a South Carolina registered Professional Engineer and/or Architect to break away from a water load less than that which would occur during the base flood.

Fill Restrictions:

No fill is permitted to be used for structural purposes in "V and VE" flood zones. Landscaping fill is only permitted if a South Carolina registered Professional Engineer certifies in writing that the fill will not cause wave run-up or deflection.

Obstructions Prohibited:

No obstructions are permitted below the base flood elevation within a structure. Obstructions not located within a structure (e.g. permanent planters, elevated swimming pools, elevated tennis courts, certain types of fences, etc.) are also not permitted unless a South Carolina registered Professional Engineer certifies in writing that the obstructions will not cause wave run-up or deflection.

Where can I get a "flood elevation certificate" to determine the actual elevation of my structure?

For properties located in Unincorporated Charleston County, Awendaw, Hollywood, Kiawah Island, Meggett, Ravenel, Rockville, and Seabrook Island, the Charleston County Building Services Department maintains copies of flood elevation certificates for all new construction and substantially improved structures. If your structure was constructed in one of these jurisdictions since 1990, the Charleston County Building Services Department may have an elevation certificate on file for your structure.

For structures where an elevation certificate is not available on file, a S.C. Registered Land Surveyor will need to survey the elevation of the structure and complete the flood elevation certificate form. Charleston County does not survey structures for the purpose of completing flood elevation certificates.

If someone is dumping trash into the drainage ditches or system in my neighborhood, what should I do?

Charleston County has passed an ordinance prohibiting the dumping of trash, landscape debris or other materials into stream channels, ponds, basins or ditches that regularly carry or store stormwater in the unincorporated areas of Charleston County. These channels are routinely cleaned and maintained by the Charleston County Public Works Department.

Residents of Unincorporated Charleston County are encouraged to assist in maintaining the drainage channels and ditches by removing or reporting obstructions (i.e. shopping carts, debris, trash, etc.) at (843) 202-7600. Keeping drainage channels free of obstruction reduces flooding potential in the event of heavy rains.

If my property has been flooded, what should I do?

First and foremost, make certain the building is structurally sound and is not going to collapse or cause other physical harm prior to entering a damaged structure. Shut off the electrical and/or gas service to the structure if there is any possibility that the service is damaged. Notify all applicable insurance carriers of the damage immediately to begin the claims process.

If your property is one of many damaged by an event, make sure the address of your property is clearly indicated for inspectors and insurance adjusters.

Take photographs of any damaged areas. Secure the property from any additional damages if possible. Wait for your insurance company to give you clearance to begin cleaning up damaged areas.

The Federal Emergency Management Agency (FEMA) also has information available online regarding the first steps to take after a flood and about repairing your flooded home. Be careful to avoid injury during post-event clean-up and salvage operations. Make sure any contractors you hire to repair your property are licensed or registered for the type of work they are performing and obtain applicable permits prior to starting work on your property.

Licensing and permit information is available from the Building Services Department.

Does Charleston County have a plan to address preparing for floods and other hazard events?

Charleston County coordinates a regional planning initiative, involving the County and municipalities within Charleston County, in developing and maintaining the Charleston Regional Hazard Mitigation Plan. This plan is updated annually to reflect changes that have occurred during the year.

Anyone who would like to provide input into the Charleston Regional Hazard Mitigation Plan may do so by e-mailing the Building Services Department at BuildingServices@CharlestonCounty.org, or by calling the department at (843) 202-6930. The public is also invited to attend committee meetings regarding plan updates.

If you have any questions call (843) 202-6930.

What if my property contains wetland areas or dunes?

Flood hazard areas in Charleston County may contain wetland areas which serve natural and beneficial functions such as flood moderation, water quality enhancement, ground water recharge, and habitat for wildlife. Beachfront areas may also contain primary ocean front dunes, which serve as buffers against minor wave height fluctuations and beach erosion.

Protecting these areas maintains their important functions. Activities that disturb beachfront and saltwater wetlands should not be undertaken without first obtaining permits from the SC Coastal Zone Management Program.

Any disturbance of freshwater wetlands requires a permit from the U.S. Army Corps of Engineers and certification from S.C. DHEC's Office of Ocean and Coastal Resource Management.

Where can I get real time information on water elevations for streams and rivers in Charleston County?

The United States Geological Survey (USGS) has placed stream gages in rivers and streams that indicate real-time water elevations at the following locations within Charleston County:

  • Cooper River at Highway 17 - 021720709
  • Cooper River at Mobay N. Charleston - 02172053
  • Cooper River at Filbin Creek - 021720677
  • Cooper River at Customs House - 021720711
  • Turkey Creek at SCDOT Maintenance Yard - 021720646
  • Ashley River near N. Charleston - 021720869

For topographic map information please contact the Building Inspections Department.

These stream gage elevations are to be used for approximations only. Always follow emergency instructions that will be broadcast over local television and radio stations through the Emergency Alert System as weather advisories are released or updated by the National Weather Service. If evacuations are required, it is imperative that you follow instructions. Street patrols and door-to-door notifications may be used if an evacuation is mandatory. Generally, residents are given 48-72 hours notice in advance of a hurricane.

Charleston County also uses a telephone notification system for emergency information. For more information and free registration, please visit the Community Alert System

Questions regarding emergency procedures may be directed to the Charleston County Emergency Management Department.

Managing Storm Debris

When a dangerous storm hits, you know what to do, but what about afterwards? Cooperation and proper clean-up procedures can go a long way toward regaining our way of life.

Please be sure to separate your debris into the following categories:
  • Yard Debris - including trees and brush
  • Building Debris - including construction materials, carpet and furniture
  • Bulky Metal Items - including appliances and bikes
  • Household Garbage - including food and paper waste
  • Household Hazardous Materials - paint, solvents, cleaners, fertilizers and insecticides should be separated with extreme care
As you clear debris from your yard and home, please be careful not to block:
  • Roadways
  • Fire Hydrants
  • Utility Boxes

Do your part to help speed up the recovery process!

For more information

Website: Charleston County Environmental Management

Phone: (843) 720-7111

Website: Berkeley County Water & Sanitation

Phone: (843) 572-4400

Website: Dorchester County Public Works

Phone: (843) 832-0070

Hurricane Evacuation Information

"Move from the water, Brace for the wind" If you are advised to evacuate your home and move to temporary location, there are a few things you should remember:
  • Follow the instructions and advice of your local government. If you are advised to evacuate, do so promptly. If certain travel routes are specified or recommended, use those routes (Charleston County Evacuation Directions and Map). Once an order is given you may not be allowed to select your route. If you plan to leave, leave early.
  • Travel with care.
    • If you are driving your car to another location, keep in mind it is best to leave early enough to avoid being marooned by flooding roads, fallen trees and wires.
    • Make sure the gas tank in your car is full and listen to the radio as you travel for additional information and instructions from the government.
    • Make sure you have a South Carolina highway map in your vehicle.
    • Evaluate and be prepared to use parallel routes out of the community - this may include smaller roads that run parallel to the interstates and other highways.
    • If you must travel with more than one vehicle, plan to leave early to avoid traffic.
    • In advance of leaving your residence, prepare your family Emergency Kit and take it with you in the car.
  • When an emergency is declared and an evacuation order is announced, designated Shelters are opened by school officials, operated by the Red Cross and announced on local radio and television stations.
  • While shelters are available in a hurricane situation, officials urge citizens to use alternative housing options, such as traveling to a friend's or relative's inland home or a motel. And remember, even inland shelters and motels may experience loss of electrical power. Take your Emergency Kit with you.
  • Citizens who do relocate to a shelter are asked to bring blankets and pillows, some food for the first day and any necessary medications and sanitary supplies. It is highly recommended citizens bring their Emergency Kit.

Hurricane Shelters

Charleston County provides general population shelters for citizens who have been evacuated from their homes, for those who live in low-lying areas, and for others seeking shelter from a storm. Shelters are alcohol, drug, and weapon free.

While shelters are available in a hurricane situation, officials urge citizens to use alternative housing options, such as traveling to a friend's or relative's inland home or a motel. And remember, even inland shelters and motels may experience loss of electrical power. Take your Emergency Supplies Kit with you.

Items to bring to the shelter:
  • Water and food (3-day supply)
  • Clothing and bedding
  • Personal items, toiletries and medications
  • First-aid supplies
  • Important papers
  • Miscellaneous items like games, toys, battery-powered radios and flashlights
  • Identification card
  • Medical Information card
  • Daily prescriptions (2-week supply)
  • Non-prescription medicines (2-week supply)
  • Mobile phone charger, if needed
  • Other special items such as eyeglasses, hearing aids, prosthetic devices, walkers, special dietary foods, etc.
  • Medical supplies that you utilize on a daily basis, this includes any portable oxygen, cannula, diabetes testing kit, nebulizer, etc.
  • A book, magazine, or something to occupy your time while you wait for the storm to pass

The American Red Cross and/or Salvation Army provides food at the shelters. You are encouraged to bring some food, snacks, and water with you.

In addition, please bring the names, addresses, and telephone numbers of family and friends should you need to contact them or to provide information of your whereabouts. Also, leave your porch light on; this will assist the authorities that drive around your neighborhood after the storm to indicate that you have electricity.

Pets are welcomed at all "Pet-Friendly" shelters. It is important to bring shot records, food, and a crate. Pets are not allowed in General Public Shelters unless they are service animals.

Pet-Friendly Shelters

Charleston County anticipates opening pet-friendly shelters during an emergency and reminds families to include pets in their hurricane prep plans:

  • Ensure pet vaccinations are current.
  • Consider microchipping pets if not already done so to ensure you can find pets in the event you are separated.
  • Have a copy of your pet's medical records, which should be included in your "Pet Disaster Kit"
  • Arrange for a safe place to stay that permits pets.
  • Research places that are pet friendly. (Note – animals are not allowed in Red Cross Shelters, except for service animals, so you may want to stay with a friend or relative, or motel/hotel that is pet-friendly).
  • If possible, PLEASE do not leave pets behind during an evacuation or emergency.
  • With pending serious weather, bring all households pets inside.

The American Red Cross and/or Salvation Army provides food at the shelters. You are encouraged to bring some food, snacks, and water with you.

In addition, please bring the names, addresses, and telephone numbers of family and friends should you need to contact them or to provide information of your whereabouts. Also, leave your porch light on; this will assist the authorities that drive around your neighborhood after the storm to indicate that you have electricity.

Pets are welcomed at all "Pet-Friendly" shelters. It is important to bring shot records, food, and a crate. Pets are not allowed in General Public Shelters unless they are service animals.

For pet-friendly shelters, individuals are asked to bring a carrier, copy of medical records to ensure pets are current on vaccines, food, water and any necessary medications and identification for the pet.

You should plan on staying for the duration of the event or until it is safe to leave.

Evacuation Directions

Evacuation Map

Charleston, Dorchester, and Berkeley County Evacuation Zone Descriptions

Awendaw & McClellanville

Evacuees will take SC 45 to US 52 where they will be directed right onto US 52 to SC 375 to US 521 to SC 261 to US 378 to Columbia.

City of Charleston

The west side of the city (West Ashley) will use SC 61 to US 78, US 321, and SC 389 to I-20. Downtown will use the normal lanes of I-26. Under certain conditions, access to the reversed lanes of I-26 will begin at the Nexton Crossover near Exit 197. Please follow evacuation instructions provided by law enforcement, official traffic control devices, and SCDOT 511.

Daniel Island

Use I-526.

East Cooper

Evacuees leaving Mount Pleasant will take I-526 or US 17 south to I-26. Those leaving Sullivan's Island will use SC 703 to I-526 Business to access I-526, then I-26. Evacuees from the Isle of Palms will use the Isle of Palms connector (SC 517) to go to US 17, where the right lane will turn north on US 17, then proceed to SC 41, to SC 402, then to US 52 to SC 375, then to US 521, to SC 261 to US 378 to Columbia. Evacuees using the left lanes of the Isle of Palms connector will turn left to go to I-526 and then on to I-26. Evacuees on I-526 from East Cooper will be directed to the normal westbound lanes of I-26. Under certain conditions, access to the reversed lanes of I-26 will begin at the Nexton Crossover near Exit 197. Please follow evacuation instructions provided by law enforcement, official traffic control devices, and SCDOT 511.

Edisto Island, Adams Run

Evacuees will take SC 174 to US 17. They will then take US 17 south to SC 64. This will take them to Walterboro, and then to Aiken and I-20.

James Island & Folly Beach

Use SC 171 to US 17. Evacuees should then travel south on US 17 to I-526 to the normal lanes of I-26. Under certain conditions, access to the reversed lanes of I-26 will begin at the Nexton Crossover near Exit 197. Please follow evacuation instructions provided by law enforcement, official traffic control devices, and SCDOT 511.

Johns Island, Kiawah Island & Seabrook

Use SC 700 to Main Road (S-20) to US 17. Evacuees will then take US 17 south to SC 64 where they will go to Walterboro, then to Aiken and I-20.

North Charleston

Evacuees will take US 52 (Rivers Avenue) to US 78 to US 178 to Orangeburg then to I-20 or continue on US 52 to US 176 or continue north on US 52. The right lanes of US 52 at Goose Creek will continue on to Moncks Corner. In Moncks Corner, evacuees will be directed onto SC 6, where SC 6 will take them toward Columbia. The left lanes of US 52 at Goose Creek will go onto US 176 to Columbia. Evacuees using SC 642 will travel west toward Summerville and take road S-22 (Old Orangeburg Road) to US 78 west.

Yonges Island, Meggett, Hollywood, Ravenel

Use SC 165 to US 17, then US 17 south to SC 64 where they will go to Walterboro, then to Aiken and I-20.