From Scientific American: FEMA Does Not Know if 750,000 Homes Are Flood-Prone

The U.S. flood insurance program has inaccurate elevation data about many high-risk homes that enjoy discounted premiums

The nation’s flood insurance program doesn’t know the elevation of 750,000 high-risk homes with discounted policies, according to the National Research Council.

The omission could complicate efforts to phase out subsidized insurance rates in the National Flood Insurance Program, said researchers who contributed to a technical report that suggests the program needs to modernize the way it collects data and sets rates.