Sheridan County
Wyoming — Natural Disaster Risk Assessment
LowComposite Risk Score
National percentile: 65th
Sheridan County faces low composite natural disaster risk (NRI Risk Index score 65.2, 65th national percentile), driven primarily by wildfire and winter weather exposure. Expected annual loss across all 18 hazard types is $26M.
Source: FEMA National Risk Index v1.20 · Updated December 2025
Top Hazards
All 18 Hazard Risks
| Wildfire | Medium | 0.01 / yr | $3M |
| Winter Weather | High | 25.91 / yr | $608K |
| Avalanche | Medium | 0.03 / yr | $457K |
| Cold Wave | Medium | 2.08 / yr | $3M |
| Landslide | Low | 4.33 / yr | $11K |
| Riverine Flood | Medium | 0.71 / yr | $17M |
| Lightning | Medium | 34.95 / yr | $498K |
| Earthquake | Low | 0.00 / yr | $649K |
| Hail | Low | 1.27 / yr | $407K |
| Heat Wave | Very Low | 1.26 / yr | $172K |
| Drought | Very Low | 78.33 / yr | $8K |
| Tornado | Very Low | 0.21 / yr | $303K |
| Strong Wind | Very Low | 0.70 / yr | $140K |
| Ice Storm | Very Low | 0.01 / yr | $9K |
| Volcanic Activity | Very Low | 0.00 / yr | $0 |
| 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 Sheridan County?
Sheridan County has a composite FEMA National Risk Index score of 65.2 out of 100, placing it in the Low category and the 65th national percentile. This combines Expected Annual Loss, Social Vulnerability, and Community Resilience across 18 hazard types.
What are the top natural hazards in Sheridan County?
The three highest-rated hazards are Wildfire (Medium, $3M EAL), Winter Weather (High, $608K EAL), Avalanche (Medium, $457K EAL). These account for most of the county's expected annual losses.
How does Sheridan County compare to other Wyoming counties?
Sheridan County ranks #4 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. Sheridan County's $26M EAL is a statistical average, not a guarantee for any specific year or address.