Flood disasters in the United States

How common are Flood disasters in the U.S.?

FEMA has issued 90 federal disaster declarations classified as flood between 1973 and 2026, affecting 37 states and territories. Each declaration represents a formal federal recognition that an event exceeded state and local response capacity, unlocking Public Assistance, Individual Assistance, or Hazard Mitigation Grant Program funding depending on the declaration class (DR, EM, or FM). Raw declaration counts therefore measure the federal response footprint, which is a lagging and thresholded indicator: smaller events handled entirely at the state level never appear, and declaration thresholds have been recalibrated over the dataset's multi-decade history.

Where these declarations land varies widely by state. The three states with the most flood declarations on record are MT (6 declarations), VT (6 declarations), AK (5 declarations), largely explained by regional exposure rather than population size alone. States with the fewest declarations, including TN (1), LA (1), AL (1), a sign that most local events here never crossed the federal declaration threshold.

Annual declaration counts move in fits and starts rather than a smooth trend. The peak year on record was 2023, with 23 flood declarations issued that single year, a clustering driven by major multi-state events and the federal government's declaration cadence. The most recent year on record is 2026, with 10 declarations. Trends over the 53+ year history reflect a mix of policy recalibration and genuine year-to-year hazard variability.