Davis County
Utah — Natural Disaster Risk Assessment
MediumComposite Risk Score
National percentile: 88th
Davis County faces medium composite natural disaster risk (NRI Risk Index score 87.8, 88th national percentile), driven primarily by earthquake and lightning exposure. Expected annual loss across all 18 hazard types is $128M.
Source: FEMA National Risk Index v1.20 · Updated December 2025
Top Hazards
All 18 Hazard Risks
| Earthquake | Medium | 0.02 / yr | $89M |
| Lightning | Very High | 33.73 / yr | $5M |
| Landslide | Medium | 0.40 / yr | $217K |
| Wildfire | Medium | 0.00 / yr | $3M |
| Avalanche | High | 0.33 / yr | $3M |
| Winter Weather | High | 25.05 / yr | $636K |
| Strong Wind | High | 1.19 / yr | $3M |
| Heat Wave | Medium | 2.20 / yr | $4M |
| Riverine Flood | Low | 0.39 / yr | $16M |
| Cold Wave | Low | 0.16 / yr | $2M |
| Volcanic Activity | Very Low | 0.00 / yr | $17 |
| Drought | Low | 46.03 / yr | $134K |
| Ice Storm | Low | 0.01 / yr | $73K |
| Tornado | Low | 0.04 / yr | $1M |
| Hail | Very Low | 0.28 / yr | $113K |
| 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 Davis County?
Davis County has a composite FEMA National Risk Index score of 87.8 out of 100, placing it in the Medium category and the 88th national percentile. This combines Expected Annual Loss, Social Vulnerability, and Community Resilience across 18 hazard types.
What are the top natural hazards in Davis County?
The three highest-rated hazards are Earthquake (Medium, $89M EAL), Lightning (Very High, $5M EAL), Landslide (Medium, $217K EAL). These account for most of the county's expected annual losses.
How does Davis County compare to other Utah counties?
Davis County ranks #4 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. Davis County's $128M EAL is a statistical average, not a guarantee for any specific year or address.