Weber County
Utah — Natural Disaster Risk Assessment
MediumComposite Risk Score
National percentile: 87th
Weber County faces medium composite natural disaster risk (NRI Risk Index score 87.0, 87th national percentile), driven primarily by earthquake and lightning exposure. Expected annual loss across all 18 hazard types is $104M.
Source: FEMA National Risk Index v1.20 · Updated December 2025
Top Hazards
All 18 Hazard Risks
| Earthquake | Medium | 0.02 / yr | $66M |
| Lightning | High | 32.79 / yr | $3M |
| Wildfire | Medium | 0.00 / yr | $4M |
| Avalanche | High | 0.47 / yr | $4M |
| Winter Weather | High | 33.10 / yr | $668K |
| Heat Wave | Medium | 1.17 / yr | $3M |
| Strong Wind | Medium | 1.14 / yr | $2M |
| Riverine Flood | Low | 0.61 / yr | $19M |
| Landslide | Very Low | 0.45 / yr | $2K |
| Cold Wave | Low | 0.17 / yr | $1M |
| Drought | Low | 48.34 / yr | $156K |
| Ice Storm | Low | 0.01 / yr | $61K |
| Tornado | Low | 0.05 / yr | $915K |
| Hail | Very Low | 0.29 / yr | $76K |
| Coastal Flood | Very Low | 0.00 / yr | $0 |
| Hurricane | Very Low | 0.00 / yr | $0 |
| Tsunami | Very Low | 0.00 / yr | $0 |
| Volcanic Activity | Very Low | 0.00 / yr | $0 |
Frequently Asked Questions
What is the overall natural disaster risk for Weber County?
Weber County has a composite FEMA National Risk Index score of 87.0 out of 100, placing it in the Medium category and the 87th national percentile. This combines Expected Annual Loss, Social Vulnerability, and Community Resilience across 18 hazard types.
What are the top natural hazards in Weber County?
The three highest-rated hazards are Earthquake (Medium, $66M EAL), Lightning (High, $3M EAL), Wildfire (Medium, $4M EAL). These account for most of the county's expected annual losses.
How does Weber County compare to other Utah counties?
Weber County ranks #5 of 29 Utah counties for overall natural disaster risk, with a medium 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. Weber County's $104M EAL is a statistical average, not a guarantee for any specific year or address.