112,265
Recorded events
3,124
Counties affected
2,188
Direct deaths
$121.5B
Property damage
112,265 flash flood events are recorded across 3,124 U.S. counties between 1996 and 2026.
Systematic records for this hazard begin in 1996 — earlier gaps reflect reporting practice, not calm weather.
Most affected
Top counties for flash flood
| Rank | County | Events | Deaths | Damage |
|---|---|---|---|---|
| #1 | San Bernardino County, California | 836 | 21 | $190.9M |
| #2 | Mohave County, Arizona | 656 | 8 | $15.2M |
| #3 | Maricopa County, Arizona | 580 | 15 | $57.4M |
| #4 | Pima County, Arizona | 521 | 19 | $25.9M |
| #5 | Allegheny County, Pennsylvania | 497 | 6 | $60.3M |
| #6 | Bexar County, Texas | 399 | 46 | $51.1M |
| #7 | Clark County, Nevada | 369 | 12 | $112.7M |
| #8 | Yavapai County, Arizona | 318 | 5 | $10.8M |
| #9 | Baltimore County, Maryland | 314 | 2 | $12.7M |
| #10 | Greene County, Missouri | 297 | 1 | $20.5M |
| #11 | Charleston County, South Carolina | 296 | 1 | $20.2M |
| #12 | Dallas County, Texas | 296 | 11 | $877.1M |
| #13 | Riverside County, California | 295 | 3 | $179.5M |
| #14 | Tarrant County, Texas | 285 | 15 | $73.6M |
| #15 | Wake County, North Carolina | 280 | 1 | $70.3M |
| #16 | Coconino County, Arizona | 278 | 24 | $32.0M |
| #17 | Washington County, Utah | 275 | 26 | $30.5M |
| #18 | Bergen County, New Jersey | 269 | 3 | $17.5M |
| #19 | San Diego County, California | 256 | 5 | $51.6M |
| #20 | Tulsa County, Oklahoma | 246 | 3 | $6.2M |
| #21 | Caddo Parish, Louisiana | 246 | 2 | $12.1M |
| #22 | Travis County, Texas | 243 | 24 | $133.0M |
| #23 | Montgomery County, Maryland | 241 | 1 | $3.4M |
| #24 | Richland County, South Carolina | 238 | 9 | $30.8M |
| #25 | Fairfax County, Virginia | 238 | 2 | $11.4M |