Graham County
Arizona — Natural Disaster Risk Assessment
LowComposite Risk Score
National percentile: 65th
Graham County faces low composite natural disaster risk (NRI Risk Index score 64.6, 65th national percentile), driven primarily by heat wave and wildfire exposure. Expected annual loss across all 18 hazard types is $18M.
Source: FEMA National Risk Index v1.20 · Updated December 2025
Top Hazards
All 18 Hazard Risks
| Heat Wave | Medium | 4.85 / yr | $5M |
| Wildfire | Medium | 0.01 / yr | $2M |
| Lightning | High | 57.83 / yr | $1M |
| Drought | Medium | 85.20 / yr | $677K |
| Winter Weather | Medium | 7.08 / yr | $117K |
| Riverine Flood | Low | 1.71 / yr | $9M |
| Avalanche | Very Low | 0.01 / yr | $591 |
| Earthquake | Very Low | 0.00 / yr | $185K |
| Landslide | Very Low | 1.96 / yr | $608 |
| Hail | Very Low | 0.19 / yr | $99K |
| Strong Wind | Very Low | 0.48 / yr | $95K |
| Hurricane | Very Low | 0.02 / yr | $2K |
| Cold Wave | Very Low | 0.02 / yr | $3K |
| Tornado | Very Low | 0.09 / yr | $4K |
| Coastal Flood | Very Low | 0.00 / yr | $0 |
| Ice Storm | 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 Graham County?
Graham County has a composite FEMA National Risk Index score of 64.6 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 Graham County?
The three highest-rated hazards are Heat Wave (Medium, $5M EAL), Wildfire (Medium, $2M EAL), Lightning (High, $1M EAL). These account for most of the county's expected annual losses.
How does Graham County compare to other Arizona counties?
Graham County ranks #14 of 15 Arizona 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. Graham County's $18M EAL is a statistical average, not a guarantee for any specific year or address.