Teton County
Wyoming — Natural Disaster Risk Assessment
LowComposite Risk Score
National percentile: 71th
Teton County faces low composite natural disaster risk (NRI Risk Index score 70.6, 71th national percentile), driven primarily by avalanche and lightning exposure. Expected annual loss across all 18 hazard types is $40M.
Source: FEMA National Risk Index v1.20 · Updated December 2025
Top Hazards
All 18 Hazard Risks
| Avalanche | Very High | 2.07 / yr | $23M |
| Lightning | Very High | 38.45 / yr | $4M |
| Landslide | Medium | 6.23 / yr | $139K |
| Wildfire | Medium | 0.00 / yr | $2M |
| Earthquake | Low | 0.04 / yr | $5M |
| Volcanic Activity | Very Low | 0.00 / yr | $86 |
| Winter Weather | Medium | 38.47 / yr | $145K |
| Riverine Flood | Very Low | 0.36 / yr | $6M |
| Cold Wave | Very Low | 0.26 / yr | $367K |
| Hail | Very Low | 0.19 / yr | $111K |
| Tornado | Very Low | 0.09 / yr | $308K |
| Drought | Very Low | 66.04 / yr | $2K |
| Ice Storm | Very Low | 0.01 / yr | $9K |
| Strong Wind | Very Low | 0.26 / yr | $89K |
| Heat Wave | Very Low | 0.00 / yr | $1 |
| 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 70.6 out of 100, placing it in the Low category and the 71th 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 (Very High, $23M EAL), Lightning (Very High, $4M EAL), Landslide (Medium, $139K EAL). These account for most of the county's expected annual losses.
How does Teton County compare to other Wyoming counties?
Teton County ranks #2 of 23 Wyoming 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. Teton County's $40M EAL is a statistical average, not a guarantee for any specific year or address.