Bannock County
Idaho — Natural Disaster Risk Assessment
LowComposite Risk Score
National percentile: 67th
Bannock County faces low composite natural disaster risk (NRI Risk Index score 66.9, 67th national percentile), driven primarily by wildfire and winter weather exposure. Expected annual loss across all 18 hazard types is $31M.
Source: FEMA National Risk Index v1.20 · Updated December 2025
Top Hazards
All 18 Hazard Risks
| Wildfire | Medium | 0.01 / yr | $9M |
| Winter Weather | High | 24.17 / yr | $997K |
| Cold Wave | Medium | 0.88 / yr | $8M |
| Earthquake | Low | 0.01 / yr | $3M |
| Lightning | Medium | 33.36 / yr | $870K |
| Heat Wave | Medium | 2.07 / yr | $2M |
| Volcanic Activity | Very Low | 0.00 / yr | $99 |
| Landslide | Very Low | 1.19 / yr | $3K |
| Riverine Flood | Low | 1.86 / yr | $8M |
| Hail | Low | 0.42 / yr | $217K |
| Avalanche | Very Low | 0.01 / yr | $64 |
| Ice Storm | Very Low | 0.01 / yr | $20K |
| Drought | Very Low | 67.55 / yr | $1K |
| Tornado | Very Low | 0.12 / yr | $177K |
| Strong Wind | Very Low | 0.75 / yr | $123K |
| 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 Bannock County?
Bannock County has a composite FEMA National Risk Index score of 66.9 out of 100, placing it in the Low category and the 67th national percentile. This combines Expected Annual Loss, Social Vulnerability, and Community Resilience across 18 hazard types.
What are the top natural hazards in Bannock County?
The three highest-rated hazards are Wildfire (Medium, $9M EAL), Winter Weather (High, $997K EAL), Cold Wave (Medium, $8M EAL). These account for most of the county's expected annual losses.
How does Bannock County compare to other Idaho counties?
Bannock County ranks #7 of 44 Idaho 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. Bannock County's $31M EAL is a statistical average, not a guarantee for any specific year or address.