Map scale
i
Count flash floods by
i
Episode: one whole storm system, such as a tropical storm or a line of thunderstorms. A single episode can flood many counties.
i
Event: one flash flood report in one place. Several events can belong to the same episode.
Color the map by
i
What the colors mean
Time window
to
Show the full record (2015 to 2025)
Totals for selected years
Storm episodes
Flash flood events
Fatalities
Injuries
Reported damage
What is included. Weather-caused flash floods only: heavy rain, tropical
systems, rain on burn scars, rain with snowmelt, and ice jams. Reports caused by
dam or levee failures are removed. Click any county or watershed for its impact
record. Source: NOAA NCEI Storm Events Database, 2015 to 2025, lower 48 states
and DC. Read
how these records were built.
