San Juan County
Utah — Natural Disaster Risk Assessment
Very LowComposite Risk Score
National percentile: 27th
San Juan County faces very low composite natural disaster risk (NRI Risk Index score 26.8, 27th national percentile), driven primarily by landslide and avalanche exposure. Expected annual loss across all 18 hazard types is $5M.
Source: FEMA National Risk Index v1.20 · Updated December 2025
Top Hazards
All 18 Hazard Risks
| Landslide | High | 3.85 / yr | $492K |
| Avalanche | High | 0.07 / yr | $913K |
| Winter Weather | Medium | 10.10 / yr | $135K |
| Wildfire | Low | 0.00 / yr | $298K |
| Lightning | Medium | 46.57 / yr | $428K |
| Heat Wave | Low | 1.24 / yr | $776K |
| Drought | Low | 133.01 / yr | $130K |
| Earthquake | Very Low | 0.00 / yr | $211K |
| Riverine Flood | Very Low | 1.86 / yr | $2M |
| Ice Storm | Very Low | 0.01 / yr | $12K |
| Volcanic Activity | Very Low | 0.00 / yr | $0 |
| Strong Wind | Very Low | 0.09 / yr | $23K |
| Tornado | Very Low | 0.12 / yr | $13K |
| Cold Wave | Very Low | 0.00 / yr | $4 |
| Hail | Very Low | 0.06 / yr | $2K |
| 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 San Juan County?
San Juan County has a composite FEMA National Risk Index score of 26.8 out of 100, placing it in the Very Low category and the 27th national percentile. This combines Expected Annual Loss, Social Vulnerability, and Community Resilience across 18 hazard types.
What are the top natural hazards in San Juan County?
The three highest-rated hazards are Landslide (High, $492K EAL), Avalanche (High, $913K EAL), Winter Weather (Medium, $135K EAL). These account for most of the county's expected annual losses.
How does San Juan County compare to other Utah counties?
San Juan County ranks #15 of 29 Utah counties for overall natural disaster risk, with a very 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. San Juan County's $5M EAL is a statistical average, not a guarantee for any specific year or address.