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. Geospatial Resource Center The FEMA Geospatial Resource Center lets you find disaster response data, maps and applications from FEMA and our governmental, private sector and other partners in one place. Subject to 100-year shallow flooding (usually areas of poundings) with average depth of 1-3 feet. Preliminary data may include: new or revised Flood Insurance Rate Maps (FIRM), Flood Insurance Study (FIS) reports, and FIRM Databases. Base flood elevation undetermined.īoth AE and A1-A30 represent areas subject to 100-year flood with base flood elevation determined. FEMA is the official public source for flood maps for insurance purposes: FEMA’s Flood Map Service Center FEMA’s National Flood Hazard Layer NOAA is responsible for producing flood forecast maps that combine precipitation data with USGS streamflow data: National Weather Service - Advanced Hydrologic Prediction Service River Forecasts Long-Range River Flood Risk Coastal Inundation Dashboard. Lenders do have the option to make the purchase of flood insurance a condition for their loans at any time, and some lenders may institute such requirements in advance of the maps becoming effective.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 The maps, instructions on their use, and information on rebuilding safer and stronger are available on the FEMA website (leaves DEC website). The maps show the current flood risk for these communities. If a property is mapped into a high-risk area (shown as a zone labeled with letters starting with “A” or “V”) and the owner has a mortgage through a federally regulated or insured lender, flood insurance will be required when the FIRM becomes effective. FEMA has released advisory base flood elevation maps for certain communities affected by Superstorm Sandy. Property Owners Can Take Advantage of “Grandfathering” This release provides community officials, the public, and other stakeholders with their first view of the current flood hazards, which include changes that may have occurred in the flood risks throughout the community, or county, since the last flood hazard map was published. The release of preliminary flood hazard maps, or Flood Insurance Rate Maps (FIRMs), is an important step in the mapping lifecycle for a community. This page is for homeowners who want to understand how their current effective Flood Map may change when the preliminary FEMA maps becomes effective. New and Preliminary Texas Flood Maps provide the public an early look at a home or community’s projected risk to flood hazards.
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