Almost six million properties throughout the U.S. have a considerable danger of flooding that isn’t disclosed by federal flood maps, based on a nonprofit analysis agency that launched its personal U.S. flood maps Monday.
The maps from nonprofit First Avenue Basis spotlight the widespread nature of flood danger. Flooding brought on about $17 billion in property harm a yr from 2010 to 2018, based on the Affiliation of State Floodplain Managers.
Householders, builders and metropolis planners have lengthy used the Federal Emergency Administration Company’s flood maps, which define flood zones. FEMA’s maps label which properties have at the very least a 1% annual danger of flooding, additionally known as a 100-year flood zone.
The First Avenue evaluation means that hundreds of thousands of American householders could possibly be extra susceptible to flooding than they understand, and plenty of could lack the assets to rebuild their properties within the occasion of extreme flood harm. Mortgage lenders usually require patrons of properties in a 100-year flood zone to buy flood insurance coverage.
FEMA classifies 8.7 million properties as having a 1% annual flood danger, based on First Avenue, whereas First Avenue’s maps put 14.6 million properties into that class, or about 10.3% of all properties within the contiguous U.S.