6/22/2023 0 Comments Flood zone xFlash floods are the #1 cause of weather-related deaths in the US. If there is a chance of flash flooding, move immediately to higher ground. ![]() These areas can flood quickly and with little warning. Avoid camping or parking along streams, rivers, and creeks during heavy rainfall. ![]() Just 6 inches of moving water can knock you down, and 1 foot of water can sweep your vehicle away.SFHA are defined as the area that will be inundated by the flood event having a 1-percent chance of being equaled or exceeded in any given year. For areas of alluvial fan flooding, velocities also determined.Ĭoastal flood zone with velocity hazard (wave action) no BFE determined.Ĭoastal areas with a 1% or greater chance of annual flooding with increased risk due to storm waves base flood elevations determined.Īreas in which flood hazards are undetermined, but possible. Flood hazard areas identified on the Flood Insurance Rate Map are identified as a Special Flood Hazard Area (SFHA). Flood depths of 1 to 3 feet (usually sheet flow on sloping terrain) average depths determined. The Flood Zone designation (A, AH, AE, C, X, X Protected by Levee) The base flood elevation where shown on the FIRM Whether or not mandatory flood insurance. The flood way is the channel of stream plus any adjacent floodplain areas that must be kept free of encroachment so that the 1% annual chance flood can be carried without increasing the BFE.ġ% chance of annual shallow flooding Flood depths of 1 to 3 feet (usually areas of ponding) base flood elevations determined.ġ% or greater chance of annual shallow flooding. FEMAs low and moderate risk flood zones those outside the SFHA are those that begin with the letters X, B, or C. Special Flood Hazard Areas (SFHAs)Īreas of 500-year flood (0.2% chance of annual flooding) 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.Īreas determined to be outside 500-year flood plain.ġ% chance of annual flooding No base flood elevations determined.įlood way areas in Zone AE. A property in the X zone is not within what is called a Special Flood Hazard Area, meaning that there is a lower risk of flooding and there is likely no requirement to purchase flood insurance. ![]() For the least amount of risk, X is the way to go. Visit the DLNR Flood Hazard Assessment Tool to find out if you are located in a SFHA. Zone X: These areas have been identified in the community flood insurance study as areas of moderate or minimal hazard from the principal source of flood. The known low risk zones (less than 1 flood risk each year): 2. FEMA developed Flood Insurance Rate Maps (FIRMs) that determine Special Flood Hazard Areas (SFHAs). Knowing your flood zone means you know your flood hazard risk. Zone X (shaded), B (moderate-risk zones) An area of moderate flood hazard that is determined to be outside the Special Flood Hazard Area between the limits of the base flood and the 0.2-percent-annual-chance (or 500-year) flood.
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