Posted Thursday, July 9, 2026 4:07 pm Floods are the costliest and most common natural disaster in the U.S., causing more than $8 billion in damage in 2024, according to the Federal Emergency Management Agency. $3.8 billion happened in areas not considered high risk. Fathom’s U.S. Flood Risk Index [2026] estimates that the average annual exposure of the U.S. population will increase by 72.6% by 2050 from 2020 levels.