Tooele County
Utah — Natural Disaster Risk Assessment
LowComposite Risk Score
National percentile: 49th
Tooele County faces low composite natural disaster risk (NRI Risk Index score 48.9, 49th national percentile), driven primarily by wildfire and winter weather exposure. Expected annual loss across all 18 hazard types is $26M.
Source: FEMA National Risk Index v1.20 · Updated December 2025
Top Hazards
All 18 Hazard Risks
| Wildfire | Medium | 0.02 / yr | $14M |
| Winter Weather | High | 11.97 / yr | $1M |
| Earthquake | Low | 0.01 / yr | $4M |
| Lightning | Medium | 30.11 / yr | $1M |
| Strong Wind | Medium | 1.12 / yr | $1M |
| Avalanche | Very Low | 0.03 / yr | $2K |
| Heat Wave | Low | 2.87 / yr | $762K |
| Drought | Low | 95.38 / yr | $65K |
| Landslide | Very Low | 2.76 / yr | $699 |
| Riverine Flood | Very Low | 0.61 / yr | $4M |
| Ice Storm | Very Low | 0.01 / yr | $16K |
| Volcanic Activity | Very Low | 0.00 / yr | $0 |
| Tornado | Very Low | 0.19 / yr | $197K |
| Hail | Very Low | 0.11 / yr | $62K |
| Cold Wave | Very Low | 0.05 / yr | $4K |
| Coastal Flood | Very Low | 0.00 / yr | $0 |
| Hurricane | Very Low | 0.00 / yr | $0 |
| Tsunami | Very Low | 0.00 / yr | $0 |
Frequently Asked Questions
What is the overall natural disaster risk for Tooele County?
Tooele County has a composite FEMA National Risk Index score of 48.9 out of 100, placing it in the Low category and the 49th national percentile. This combines Expected Annual Loss, Social Vulnerability, and Community Resilience across 18 hazard types.
What are the top natural hazards in Tooele County?
The three highest-rated hazards are Wildfire (Medium, $14M EAL), Winter Weather (High, $1M EAL), Earthquake (Low, $4M EAL). These account for most of the county's expected annual losses.
How does Tooele County compare to other Utah counties?
Tooele County ranks #10 of 29 Utah counties for overall natural disaster risk, with a low rating.
What does Expected Annual Loss (EAL) mean?
EAL is FEMA's estimate of average annual dollar losses from natural hazards, calculated from historical event data and exposure models. Tooele County's $26M EAL is a statistical average, not a guarantee for any specific year or address.