Arizona Natural Disaster Risk by County
FEMA National Risk Index rankings for all 15 counties
Arizona spans 15 counties with an average FEMA National Risk Index score of 84.5 (high risk) and roughly $3.60B in combined expected annual loss statewide. 3 counties are rated High or Very High risk.
The highest-risk county is Maricopa County (score 99.9, very high), while Greenlee County (score 12.4) carries the lowest. Use the table below to compare every county by score, top hazard, and expected annual loss.
County Rankings
| # | County | Risk Score | Risk Rating | Top Hazard | Ann. Loss |
|---|---|---|---|---|---|
| 1 | Maricopa County | Very High | Heat Wave | $2.20B | |
| 2 | Pima County | High | Heat Wave | $531M | |
| 3 | Mohave County | High | Wildfire | $105M | |
| 4 | Coconino County | Medium | Lightning | $131M | |
| 5 | Pinal County | Medium | Heat Wave | $137M | |
| 6 | Yavapai County | Medium | Wildfire | $108M | |
| 7 | Cochise County | Medium | Wildfire | $91M | |
| 8 | Yuma County | Medium | Earthquake | $91M | |
| 9 | Gila County | Medium | Wildfire | $55M | |
| 10 | Santa Cruz County | Medium | Heat Wave | $42M | |
| 11 | Navajo County | Medium | Lightning | $40M | |
| 12 | La Paz County | Medium | Riverine Flood | $28M | |
| 13 | Apache County | Low | Lightning | $21M | |
| 14 | Graham County | Low | Heat Wave | $18M | |
| 15 | Greenlee County | Very Low | Wildfire | $5M |
All 15 Arizona counties, ranked by FEMA National Risk Index score.
Frequently Asked Questions
Which Arizona county has the highest natural disaster risk?
Maricopa County has the highest FEMA National Risk Index score in Arizona at 99.9 (Very High), driven largely by heat wave.
What is the average natural disaster risk in Arizona?
Arizona counties average a National Risk Index score of 84.5 across 15 counties, with 3 rated High or Very High risk.
How much are expected annual losses across Arizona?
FEMA estimates roughly $3.60B in combined expected annual loss from natural hazards across all Arizona counties.