1,206
Recorded events
29
Counties affected
43
Direct deaths
$156.5M
Property damage
Utah flash flood history: 1,206 recorded events across 29 counties between 1996 and 2026.
Decade by decade
Utah flash flood history by decade
The 2010s are the busiest decade on record with 549 reported flash flood events across Utah. Earlier decades are thinner because systematic reporting for this hazard expanded over time, not because the weather was calmer.
County ranking
Counties with the most flash flood events in Utah
| Rank | County | Events | Deaths | Damage | Span |
|---|---|---|---|---|---|
| #1 | Washington County | 275 | 26 | $30.5M | 1996–2025 |
| #2 | Kane County | 201 | 3 | $575K | 1997–2025 |
| #3 | Wayne County | 156 | 0 | $11.6M | 1997–2025 |
| #4 | Garfield County | 134 | 3 | $1.1M | 1996–2025 |
| #5 | Grand County | 79 | 3 | $43.1M | 1997–2025 |
| #6 | San Juan County | 59 | 1 | $1.7M | 1996–2025 |
| #7 | Iron County | 52 | 0 | $14.8M | 1997–2025 |
| #8 | Emery County | 48 | 3 | $1.3M | 1997–2026 |
| #9 | Utah County | 31 | 0 | $6.8M | 2000–2025 |
| #10 | Salt Lake County | 29 | 0 | $28.7M | 1996–2023 |
| #11 | Carbon County | 18 | 2 | $8.5M | 1996–2024 |
| #12 | Tooele County | 17 | 0 | $1.1M | 2000–2024 |
| #13 | Duchesne County | 15 | 1 | $393K | 1997–2023 |
| #14 | Sevier County | 12 | 0 | $1.0M | 1996–2018 |
| #15 | Sanpete County | 11 | 0 | $1.4M | 1998–2017 |
| #16 | Uintah County | 11 | 0 | $263K | 1997–2014 |
| #17 | Daggett County | 10 | 0 | $210K | 1996–2017 |
| #18 | Piute County | 10 | 1 | $171K | 1997–2021 |
| #19 | Davis County | 10 | 0 | $546K | 1998–2023 |
| #20 | Millard County | 7 | 0 | $121K | 2007–2023 |
| #21 | Weber County | 4 | 0 | $318K | 1997–2009 |
| #22 | Beaver County | 4 | 0 | $0 | 2018–2021 |
| #23 | Juab County | 3 | 0 | $30K | 2014–2025 |
| #24 | Cache County | 3 | 0 | $0 | 2005–2007 |
| #25 | Wasatch County | 2 | 0 | $0 | 2018–2018 |
Significant events
Deadliest flash flood events in Utah
| Date | County | Scale | Deaths | Injuries |
|---|---|---|---|---|
| Sep 14, 2015 | Washington County | — | 13 | 3 |
| Sep 14, 2015 | Washington County | — | 7 | 0 |
| Jun 21, 2024 | Grand County | — | 2 | 0 |
| Jul 30, 2006 | Carbon County | — | 2 | 1 |
| May 20, 2023 | Kane County | — | 2 | 0 |
| May 11, 2020 | Emery County | — | 2 | 0 |
| Jul 27, 1998 | Washington County | — | 2 | 0 |
| Sep 10, 2008 | Garfield County | — | 2 | 2 |
| Aug 2, 2012 | Washington County | — | 1 | 0 |
| Sep 28, 2014 | Grand County | — | 1 | 0 |