They are easy-to-use resources that go beyond the basic flood hazard information on flood maps.Įxamples of relevant Flood Risk Products for coastal areas include coastal depth grids (which show how deep the water would be during the 1%-annual-chance flood at any given location) and tools that show where the risks from wave heights, severity of flooding, and erosion may have increased. These non-regulatory tools are called Flood Risk Products. With these new and updated maps, communities can make floodplain management decisions based on the best available scientific information.įEMA is working with local community officials to produce additional data and hazard mitigation tools that will enable more strategic emergency preparedness, planning and risk reduction in coastal communities. Harris County has Flood Insurance Rate Maps (FIRM) that identify all floodplain areas within the county limits. Because the 1-percent AEP flood has a 1 in 100 chance of being equaled or exceeded in any 1 year, and it has an average recurrence interval of 100 years, it often is referred to as the '100-year flood'. It does not mean that the flood will occur every 100 years rather it is the flood elevation that has a 1- percent chance of being equaled or exceeded each year. The 1-percent AEP flood was thought to be a fair balance between protecting the public and overly stringent regulation. Through Risk Mapping, Assessment and Planning (Risk MAP) , FEMA is updating the nation’s coastal Flood Insurance Studies (FIS) and Flood Insurance Rate Maps (FIRMs, or flood maps), where appropriate, and publishing new flood maps of densely populated areas that were not previously mapped. The term '100-year flood' can be misleading. The primary risk classifications used are the 1-percent-annual-chance flood event, the 0.2-percent-annual-chance flood event, and areas of minimal flood risk. To help coastal communities understand and reduce their risks, FEMA has initiated coastal flood hazard studies for 100% of the populated coastline. description: Abstract: The Digital Flood Insurance Rate Map (DFIRM) Database depicts flood risk information and supporting data used to develop the risk data.
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