Adams County
Idaho — Natural Disaster Risk Assessment
Very LowComposite Risk Score
National percentile: 40th
Adams County faces very low composite natural disaster risk (NRI Risk Index score 39.6, 40th national percentile), driven primarily by wildfire and landslide 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
| Wildfire | Medium | 0.02 / yr | $5M |
| Landslide | Medium | 1.11 / yr | $58K |
| Avalanche | High | 0.07 / yr | $913K |
| Winter Weather | Low | 19.64 / yr | $39K |
| Earthquake | Very Low | 0.00 / yr | $106K |
| Riverine Flood | Low | 0.29 / yr | $3M |
| Heat Wave | Very Low | 1.69 / yr | $43K |
| Volcanic Activity | Very Low | 0.00 / yr | $0 |
| Drought | Very Low | 17.89 / yr | $50 |
| Lightning | Very Low | 22.44 / yr | $26K |
| Cold Wave | Very Low | 0.05 / yr | $18K |
| Hail | Very Low | 0.16 / yr | $7K |
| Tornado | Very Low | 0.04 / yr | $5K |
| Strong Wind | Very Low | 0.14 / yr | $11K |
| Ice Storm | Very Low | 0.01 / yr | $860 |
| 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 Adams County?
Adams County has a composite FEMA National Risk Index score of 39.6 out of 100, placing it in the Very Low category and the 40th national percentile. This combines Expected Annual Loss, Social Vulnerability, and Community Resilience across 18 hazard types.
What are the top natural hazards in Adams County?
The three highest-rated hazards are Wildfire (Medium, $5M EAL), Landslide (Medium, $58K EAL), Avalanche (High, $913K EAL). These account for most of the county's expected annual losses.
How does Adams County compare to other Idaho counties?
Adams County ranks #22 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. Adams County's $10M EAL is a statistical average, not a guarantee for any specific year or address.