4/17/2024 0 Comments What are the fema flood zones![]() The coastal area subject to a velocity hazard (wave action) where BFEs are provided on the FIRM map.Īrea of moderate flood hazard, usually the area between the limits of the 100-year and 500-year floods. ![]() The coastal area subject to a velocity hazard (wave action) where BFEs are not determined on the FIRM map. The base floodplain that results from the decertification of a previously accredited flood protection system that is in the process of being restored to provide a 100-year or greater level of flood protection. BFEs are provided.Īrea to be protected from base flood by levees or Federal Flood Protection Systems under construction. Base flood depths (feet above ground) are provided. The base floodplain with sheet flow, ponding or shallow flooding. On newer FIRMs, AE Zones are the same as A1-A30 Zones (i.e., BFEs are shown). BFEs are shown on a FEMA map that includes any of these zones. Known as numbered A Zones (e.g., A7 or A14). This is often called an unnumbered A Zone or an approximate A zone. Six types of 'A' zones are described below.īase flood elevations (BFE) are not determined. Please see the table below for explanations of these zones. Flood hazards are undetermined.Whatever the area shown on a FEMA FIRM map, it may include several types of floodplain zones, each designated by a letter or a combination of a letter and number(s). Can include areas inundated by 0.2% annual chance flooding areas inundated by 1% annual chance flooding with average depths of less than 1 foot or with drainage areas less than 1 square mile areas protected by levees from 1% annual chance flooding or areas outside the 1% and 0.2% annual chance floodplains. These zones are shown on the FIRM as shaded "X" zones.Īnnual Probability of Flooding of Less than 0.2%Īreas outside the 500-year flood plain with less than 0.2% annual probability of flooding.Īnnual Probability of Flooding of Less than 1%Īreas outside a "Special Flood Hazard Area" (or 100-year flood plain). This is an area inundated by 1% annual chance flooding for which no base flood elevations have been determined.Īnnual Probability of Flooding of 0.2% to 1%Īreas between the limits of the 100-year and 500-year flood or certain areas subject to 100-year flood with average depths less than 1 foot or where the contributing drainage area is less than 1 square mile or areas protected by levees from the 100-year flood. This area has been delineated based on available information on past floods. No distinctions have been made between the different flood hazard zones that may be included within the SFHA.Īn area designated as a "Flood Prone Area" on a map prepared by USGS and the Federal Insurance Administration. Base flood elevation determined.Īreas in a "Special Flood Hazard Area" (or 100-year flood plain). Base flood elevation undetermined.īoth VE and V1-V30 represent areas subject to 100-year flood and additional velocity hazard (wave action). Subject to 100-year flood and additional velocity hazard (wave action). ![]() ![]() Subject to 100-year flood, with federal flood protection system (levee/dam) under construction. Subject to 100-year shallow flooding (usually sheet flow on sloping terrain) with average depth of 1-3 feet. Subject to 100-year shallow flooding (usually areas of poundings) with average depth of 1-3 feet. Base flood elevation undetermined.īoth AE and A1-A30 represent areas subject to 100-year flood with base flood elevation determined. The table below explains the flood zones that can be viewed on a community's flood insurance rate map (FIRM):Īnnual Probability of Flooding of 1% or greater
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