Heat Wave Risk in Utah
All Utah counties ranked by FEMA National Risk Index heat wave score
Heat Wave risk — prolonged periods of extreme heat that threaten health and infrastructure — is rated for 28 of 29 Utah counties in FEMA's National Risk Index. Utah County carries the state's highest heat wave score at 94.3, with $8M in expected annual heat wave losses.
No Utah county reaches the High band for heat wave, and expected annual losses from heat wave total roughly $34M statewide. The full ranking below links to each county's complete 18-hazard risk profile.
County Rankings — Heat Wave
| # | County | Heat Wave Score | Rating | Ann. Freq. | Ann. Loss |
|---|---|---|---|---|---|
| 1 | Utah County | Medium | 1.31 / yr | $8M | |
| 2 | Salt Lake County | Medium | 2.16 / yr | $6M | |
| 3 | Washington County | Medium | 2.54 / yr | $4M | |
| 4 | Kane County | Medium | 2.46 / yr | $3M | |
| 5 | Davis County | Medium | 2.20 / yr | $4M | |
| 6 | Garfield County | Medium | 1.35 / yr | $2M | |
| 7 | Weber County | Medium | 1.17 / yr | $3M | |
| 8 | San Juan County | Low | 1.24 / yr | $776K | |
| 9 | Cache County | Low | 0.49 / yr | $749K | |
| 10 | Tooele County | Low | 2.87 / yr | $762K | |
| 11 | Sanpete County | Low | 0.52 / yr | $296K | |
| 12 | Iron County | Low | 1.28 / yr | $388K | |
| 13 | Box Elder County | Low | 2.72 / yr | $458K | |
| 14 | Wayne County | Low | 1.88 / yr | $209K | |
| 15 | Millard County | Very Low | 1.73 / yr | $183K | |
| 16 | Juab County | Very Low | 1.77 / yr | $297K | |
| 17 | Grand County | Very Low | 0.87 / yr | $161K | |
| 18 | Emery County | Very Low | 1.97 / yr | $148K | |
| 19 | Beaver County | Very Low | 1.52 / yr | $147K | |
| 20 | Sevier County | Very Low | 0.30 / yr | $152K | |
| 21 | Uintah County | Very Low | 0.34 / yr | $147K | |
| 22 | Carbon County | Very Low | 0.42 / yr | $110K | |
| 23 | Duchesne County | Very Low | 0.45 / yr | $93K | |
| 24 | Wasatch County | Very Low | 0.06 / yr | $70K | |
| 25 | Summit County | Very Low | 0.05 / yr | $57K | |
| 26 | Piute County | Very Low | 0.07 / yr | $16K | |
| 27 | Morgan County | Very Low | 0.10 / yr | $23K | |
| 28 | Rich County | Very Low | 0.00 / yr | $0 |
28 Utah counties with measurable heat wave risk. See the national heat wave ranking or all Utah counties by overall risk.
Frequently Asked Questions
Which Utah county has the highest heat wave risk?
Utah County has the highest FEMA heat wave risk score in Utah at 94.3 (Medium), with $8M in expected annual losses and about 1.31 events per year.
How many Utah counties face significant heat wave risk?
28 Utah counties record measurable heat wave risk in FEMA's National Risk Index; 0 of them are rated High or Very High.