Yuma County
Arizona — Natural Disaster Risk Assessment
MediumComposite Risk Score
National percentile: 93th
Yuma County faces medium composite natural disaster risk (NRI Risk Index score 92.6, 93th national percentile), driven primarily by earthquake and heat wave exposure. Expected annual loss across all 18 hazard types is $91M.
Source: FEMA National Risk Index v1.20 · Updated December 2025
Top Hazards
All 18 Hazard Risks
| Earthquake | High | 0.09 / yr | $52M |
| Heat Wave | High | 15.77 / yr | $6M |
| Riverine Flood | Medium | 1.32 / yr | $32M |
| Drought | Medium | 40.07 / yr | $513K |
| Strong Wind | Medium | 0.33 / yr | $562K |
| Volcanic Activity | Very Low | 0.00 / yr | $23 |
| Wildfire | Very Low | 0.00 / yr | $58K |
| Landslide | Very Low | 3.67 / yr | $762 |
| Lightning | Low | 19.69 / yr | $136K |
| Hurricane | Very Low | 0.02 / yr | $6K |
| Hail | Very Low | 0.04 / yr | $43K |
| Tornado | Very Low | 0.07 / yr | $91K |
| Winter Weather | Very Low | 0.00 / yr | $0 |
| Avalanche | Very Low | 0.00 / yr | $0 |
| Coastal Flood | Very Low | 0.00 / yr | $0 |
| Cold Wave | Very Low | 0.00 / yr | $0 |
| Ice Storm | Very Low | 0.00 / yr | $0 |
| Tsunami | Very Low | 0.00 / yr | $0 |
Frequently Asked Questions
What is the overall natural disaster risk for Yuma County?
Yuma County has a composite FEMA National Risk Index score of 92.6 out of 100, placing it in the Medium category and the 93th national percentile. This combines Expected Annual Loss, Social Vulnerability, and Community Resilience across 18 hazard types.
What are the top natural hazards in Yuma County?
The three highest-rated hazards are Earthquake (High, $52M EAL), Heat Wave (High, $6M EAL), Riverine Flood (Medium, $32M EAL). These account for most of the county's expected annual losses.
How does Yuma County compare to other Arizona counties?
Yuma County ranks #8 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. Yuma County's $91M EAL is a statistical average, not a guarantee for any specific year or address.