Chouteau County
Montana — Natural Disaster Risk Assessment
Very LowComposite Risk Score
National percentile: 39th
Chouteau County faces very low composite natural disaster risk (NRI Risk Index score 39.5, 39th national percentile), driven primarily by avalanche and cold wave exposure. Expected annual loss across all 18 hazard types is $10M.
Source: FEMA National Risk Index v1.20 · Updated December 2025
Top Hazards
All 18 Hazard Risks
| Avalanche | Medium | 0.03 / yr | $457K |
| Cold Wave | Medium | 9.12 / yr | $3M |
| Wildfire | Low | 0.00 / yr | $172K |
| Winter Weather | Medium | 28.71 / yr | $106K |
| Riverine Flood | Low | 0.29 / yr | $5M |
| Drought | Low | 65.35 / yr | $113K |
| Landslide | Very Low | 1.17 / yr | $913 |
| Lightning | Low | 23.98 / yr | $151K |
| Earthquake | Very Low | 0.00 / yr | $45K |
| Heat Wave | Very Low | 1.37 / yr | $35K |
| Tornado | Very Low | 0.25 / yr | $73K |
| Ice Storm | Very Low | 0.01 / yr | $4K |
| Strong Wind | Very Low | 0.80 / yr | $58K |
| Hail | Very Low | 0.98 / yr | $21K |
| Coastal Flood | Very Low | 0.00 / yr | $0 |
| Hurricane | Very Low | 0.00 / yr | $0 |
| Tsunami | Very Low | 0.00 / yr | $0 |
| Volcanic Activity | Very Low | 0.00 / yr | $0 |
Frequently Asked Questions
What is the overall natural disaster risk for Chouteau County?
Chouteau County has a composite FEMA National Risk Index score of 39.5 out of 100, placing it in the Very Low category and the 39th national percentile. This combines Expected Annual Loss, Social Vulnerability, and Community Resilience across 18 hazard types.
What are the top natural hazards in Chouteau County?
The three highest-rated hazards are Avalanche (Medium, $457K EAL), Cold Wave (Medium, $3M EAL), Wildfire (Low, $172K EAL). These account for most of the county's expected annual losses.
How does Chouteau County compare to other Montana counties?
Chouteau County ranks #25 of 56 Montana 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. Chouteau County's $10M EAL is a statistical average, not a guarantee for any specific year or address.