![]() ![]() Īdditional information regarding flood zones and flood insurance is available from the National Flood Insurance Program. Residents are encouraged to use the MSC to find your official flood map, access a range of other flood hazard products and take advantage of tools for better understanding flood risk.Ĭurrent and preliminary flood maps for Charleston County may also be viewed on the Charleston County Flood Map Viewer. The FEMA Flood Map Service Center (MSC) is the official public source for flood hazard information produced in support of the NFIP. Click here for more information about flood zone definitions. The areas of minimal flood hazard, which are the areas outside the SFHA and higher than the elevation of the 0.2-percent-annual-chance flood, are labeled Zone C or Zone X (unshaded). Moderate flood hazard areas, labeled Zone B or Zone X (shaded) are also shown on the FIRM, and are the areas between the limits of the base flood and the 0.2-percent-annual-chance flood or "500-year flood." The 1-percent annual chance flood is also referred to as the base flood or "100-year flood." SFHAs are labeled as Zone A, Zone AO, Zone AH, Zones A1-A30, Zone AE, Zone A99, Zone AR, Zone AR/AE, Zone AR/AO, Zone AR/A1-A30, Zone AR/A, Zone V, Zone VE, and Zones V1-V30. SFHA's are defined as areas that will be inundated by a flood event having a 1-percent chance of being equaled or exceeded in any given year. The mapping standards are published, vetted, peer-reviewed, and updated continuously to ensure they are aligned with current best practices.įlood hazard areas identified on the FIRM are identified as a Special Flood Hazard Area (SFHA). Through the Risk MAP program, flood maps are developed using the best available science and analyzed by some of the leading engineering firms in the field. ![]() ![]() This data is incorporated into flood maps, known as Flood Insurance Rate Maps (FIRMs), that support the National Flood Insurance Program (NFIP) and provide the basis for community floodplain management regulations and flood insurance requirements. The Federal Emergency Management Agency (FEMA) partners with states, tribes and communities through the Risk Mapping, Assessment and Planning (Risk MAP) program to identify flood hazards, assess flood risks and provide accurate data to guide stakeholders in taking effective mitigation actions that result in safer and more resilient communities. ![]()
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