Franklin County
Idaho — Natural Disaster Risk Assessment
Very LowComposite Risk Score
National percentile: 8th
Franklin County faces very low composite natural disaster risk (NRI Risk Index score 7.6, 8th national percentile), driven primarily by wildfire and earthquake exposure. Expected annual loss across all 18 hazard types is $5M.
Source: FEMA National Risk Index v1.20 · Updated December 2025
Top Hazards
All 18 Hazard Risks
| Wildfire | Low | 0.01 / yr | $487K |
| Earthquake | Low | 0.01 / yr | $1M |
| Winter Weather | Medium | 20.64 / yr | $142K |
| Landslide | Very Low | 0.91 / yr | $978 |
| Lightning | Low | 34.30 / yr | $211K |
| Heat Wave | Very Low | 1.46 / yr | $147K |
| Avalanche | Very Low | 0.01 / yr | $90 |
| Volcanic Activity | Very Low | 0.00 / yr | $1 |
| Cold Wave | Very Low | 0.50 / yr | $316K |
| Riverine Flood | Very Low | 0.25 / yr | $3M |
| Drought | Very Low | 74.13 / yr | $2K |
| Strong Wind | Very Low | 0.58 / yr | $104K |
| Hail | Very Low | 0.34 / yr | $23K |
| Ice Storm | Very Low | 0.01 / yr | $3K |
| Tornado | Very Low | 0.05 / yr | $11K |
| 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 Franklin County?
Franklin County has a composite FEMA National Risk Index score of 7.6 out of 100, placing it in the Very Low category and the 8th national percentile. This combines Expected Annual Loss, Social Vulnerability, and Community Resilience across 18 hazard types.
What are the top natural hazards in Franklin County?
The three highest-rated hazards are Wildfire (Low, $487K EAL), Earthquake (Low, $1M EAL), Winter Weather (Medium, $142K EAL). These account for most of the county's expected annual losses.
How does Franklin County compare to other Idaho counties?
Franklin County ranks #37 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. Franklin County's $5M EAL is a statistical average, not a guarantee for any specific year or address.