Directly from their website:
https://www.fema.gov/flood-insurance. This encourages everyone to build in places that shouldn't be built in the first place.
"Floods can happen anywhere — just one inch of floodwater can cause up to thousands of dollars' worth of damage. Most homeowners insurance does not cover flood damage. Flood insurance is a separate policy that can cover buildings, the contents in a building, or both, so it is important to protect your most important assets — your home, your business, your possessions.
The NFIP provides flood insurance to property owners, renters and businesses, and having this coverage helps them recover faster when floodwaters recede. The NFIP works with communities required to adopt and enforce floodplain management regulations that help mitigate flooding effects.
Flood insurance is available to anyone living in one of the 22,600 participating NFIP communities. Homes and businesses in high-risk flood areas with mortgages from government-backed lenders are required to have flood insurance."