Flash Floods and Flooding by ZIP Code

Source period December 2025. Recomputed by ZipCheckup from the cited federal source.

From 2015 through 2024, the U.S. logged 39,861 flash-flood events and 27,205 other flood events across 3,004 counties, with 1,130 direct deaths and 234 direct injuries, as of December 2025.

By state

We report two independent facts side by side and do not rank states. A larger count reflects the size of a state's inventory and its reporting activity, not a judgment about water safety.

How we compute this

We use NOAA's National Centers for Environmental Information Storm Events database and count two inland-flooding perils at the county level between 2015 and 2024: flash floods and riverine or areal floods. Over that decade the database logs 39,861 flash-flood and 27,205 other flood events across 3,004 counties in 51 states. Coastal floods are logged by forecast zone rather than county and are not included.

A single flood that spans more than one county is recorded once in each county it affects, so our national figures count county-level events rather than unique floods. Direct deaths (1,130) and direct injuries (234) are combined across both flood types and reflect only casualties the National Weather Service attributes directly to the flooding.

Counts are grouped by state and recompute on every build; the underlying records cover the years 2015 through 2024. Counties with no recorded flood events in that window are omitted, never shown as zero, and a small number of events in U.S. territories are included in the national totals but not assigned to a state.

Frequently asked questions

@misc{zipcheckup-findings-flash-floods-and-flooding-by-zip,
  author = {{ZipCheckup}},
  title  = {{Flash Floods and Flooding by ZIP Code}},
  year   = {2025},
  url    = {https://zipcheckup.com/findings/flash-floods-and-flooding-by-zip/}
}