![]() The City found technical and scientific errors in FEMA’s modeling that overestimate the height of flood waters during a one-percent-annual-chance flood event, the “Base Flood Elevation (BFE),” by between 1 and 2.5 feet across the city. **In October 2016, FEMA announced that it agreed with the City’s findings,** and that it would work with the City to revise the 2015 Preliminary FIRMs and issue new maps in the coming years that better reflect current flood risk. In June 2015, New York City filed a technical appeal of the Preliminary FIRMs. ![]() The issuance of the Preliminary FIRMs and FIS marked the first step in the official flood map update process, which included a public comment and a 90-day technical appeals period. In January 2015, FEMA released Preliminary Flood Insurance Rate Maps for New York City as well as the Preliminary Flood Insurance Study (FIS) for New York City, a narrative report of the city’s flood hazard. Find out more about understanding FEMA’s Flood Maps. Each flood zone tells homeowners what the risk is for flooding at their property. This area is also referred to as the Special Flood Hazard Area (SFHA) or the 100-year floodplain, and is broken down into smaller areas called flood zones. This high risk area has a one percent chance of flooding in any given year, and a twenty-six percent chance of flooding over the life of a thirty-year mortgage. These maps identify areas that are at high risk to flooding. FEMA creates Flood Insurance Rate Maps (FIRMs) that highlight flood risk and determine flood insurance and building code requirements.
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