Teton County
Idaho — Natural Disaster Risk Assessment
Very LowComposite Risk Score
National percentile: 29th
Teton County faces very low composite natural disaster risk (NRI Risk Index score 29.5, 29th national percentile), driven primarily by avalanche and wildfire exposure. Expected annual loss across all 18 hazard types is $12M.
Source: FEMA National Risk Index v1.20 · Updated December 2025
Top Hazards
All 18 Hazard Risks
| Avalanche | High | 0.17 / yr | $2M |
| Wildfire | Medium | 0.00 / yr | $2M |
| Earthquake | Low | 0.02 / yr | $2M |
| Lightning | Medium | 41.11 / yr | $611K |
| Landslide | Low | 0.47 / yr | $7K |
| Winter Weather | Medium | 29.81 / yr | $134K |
| Volcanic Activity | Very Low | 0.00 / yr | $13 |
| Cold Wave | Low | 1.90 / yr | $956K |
| Riverine Flood | Very Low | 0.18 / yr | $4M |
| Hail | Very Low | 0.29 / yr | $98K |
| Drought | Very Low | 28.76 / yr | $1K |
| Tornado | Very Low | 0.02 / yr | $92K |
| Heat Wave | Very Low | 0.19 / yr | $21K |
| Ice Storm | Very Low | 0.01 / yr | $5K |
| Strong Wind | Very Low | 0.45 / yr | $43K |
| 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 Teton County?
Teton County has a composite FEMA National Risk Index score of 29.5 out of 100, placing it in the Very Low category and the 29th national percentile. This combines Expected Annual Loss, Social Vulnerability, and Community Resilience across 18 hazard types.
What are the top natural hazards in Teton County?
The three highest-rated hazards are Avalanche (High, $2M EAL), Wildfire (Medium, $2M EAL), Earthquake (Low, $2M EAL). These account for most of the county's expected annual losses.
How does Teton County compare to other Idaho counties?
Teton County ranks #28 of 44 Idaho 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. Teton County's $12M EAL is a statistical average, not a guarantee for any specific year or address.