Pinal County
Arizona — Natural Disaster Risk Assessment
MediumComposite Risk Score
National percentile: 94th
Pinal County faces medium composite natural disaster risk (NRI Risk Index score 93.8, 94th national percentile), driven primarily by heat wave and wildfire exposure. Expected annual loss across all 18 hazard types is $137M.
Source: FEMA National Risk Index v1.20 · Updated December 2025
Top Hazards
All 18 Hazard Risks
| Heat Wave | High | 12.73 / yr | $24M |
| Wildfire | High | 0.00 / yr | $12M |
| Lightning | Very High | 41.86 / yr | $2M |
| Riverine Flood | High | 3.89 / yr | $92M |
| Drought | High | 55.02 / yr | $3M |
| Hail | Medium | 0.39 / yr | $954K |
| Earthquake | Low | 0.00 / yr | $2M |
| Strong Wind | Medium | 1.77 / yr | $1M |
| Landslide | Very Low | 1.05 / yr | $1K |
| Tornado | Low | 0.38 / yr | $712K |
| Avalanche | Very Low | 0.01 / yr | $69 |
| Hurricane | Very Low | 0.01 / yr | $5K |
| Winter Weather | Very Low | 1.42 / yr | $12K |
| Cold Wave | Very Low | 0.00 / yr | $1K |
| 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 Pinal County?
Pinal County has a composite FEMA National Risk Index score of 93.8 out of 100, placing it in the Medium category and the 94th national percentile. This combines Expected Annual Loss, Social Vulnerability, and Community Resilience across 18 hazard types.
What are the top natural hazards in Pinal County?
The three highest-rated hazards are Heat Wave (High, $24M EAL), Wildfire (High, $12M EAL), Lightning (Very High, $2M EAL). These account for most of the county's expected annual losses.
How does Pinal County compare to other Arizona counties?
Pinal County ranks #5 of 15 Arizona counties for overall natural disaster risk, with a medium 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. Pinal County's $137M EAL is a statistical average, not a guarantee for any specific year or address.