Coastal High Hazard Areas (CHHAs) are areas subject to inundation by 1-percent-annual-chance flood, extending from offshore to the inland limit of a primary frontal dune along an open coast, or any other areas subject to high-velocity wave action from storms or seismic sources. Structures located within a CHHA have a 26 percent chance of flooding during the life of a standard 30-year mortgage. Federal floodplain management regulations and mandatory purchase requirements apply in these zones.
| Zone | Description |
| V | Coastal area subject to inundation by a 1-percent-annual-chance flood event and subject to additional hazards associated with storm-induced waves. Because detailed coastal analyses have not been performed, no BFEs or flood depths are shown. |
| VE, V1-V30 | Coastal areas subject to inundation by a 1-percent-annual-chance flood event and subject to additional hazards associated with storm induced high velocity wave action. BFEs derived from detailed coastal hydraulic analyses are shown. (Zone VE is used on new and revised maps in place of Zones V1-V30.) |
| *Source: Chatham County-Savannah Metropolitan Planning Commission | |