Arizona wildfire risk
Pima County has the highest wildfire risk in Arizona, scoring 99.7 out of 100 — rated "Relatively High" by FEMA's National Risk Index.
| # | County | NRI score | Rating |
NOAA events 2016–2026 |
|---|---|---|---|---|
| 1 | Pima County | 99.7 | Relatively High | 0 |
| 2 | Maricopa County | 99.6 | Relatively High | 0 |
| 3 | Yavapai County | 99.6 | Relatively High | 0 |
| 4 | Coconino County | 99.4 | Relatively High | 0 |
| 5 | Cochise County | 99.2 | Relatively High | 0 |
| 6 | Gila County | 99.1 | Relatively High | 0 |
| 7 | Mohave County | 98.8 | Relatively High | 0 |
| 8 | Navajo County | 98.8 | Relatively High | 0 |
| 9 | Santa Cruz County | 98.1 | Relatively High | 0 |
| 10 | Pinal County | 98 | Relatively High | 0 |
| 11 | Apache County | 97.9 | Relatively High | 0 |
| 12 | Graham County | 94.3 | Relatively Moderate | 0 |
| 13 | Greenlee County | 82.5 | Relatively Low | 0 |
| 14 | La Paz County | 70.2 | Relatively Low | 0 |
| 15 | Yuma County | 59.2 | Very Low | 0 |
Source: FEMA National Risk Index v1.20.0, December 2025. Scores are 0–100 percentile rankings among all US counties. See the methodology page for definitions. Download the full CSV for all counties.
Wildfire risk nationally:
Other hazard risks in Arizona:
Frequently asked questions
What is the highest wildfire risk county in Arizona?
Pima County, AZ has the highest wildfire risk in Arizona, with a FEMA National Risk Index score of 99.7 out of 100 (rated "Relatively High").
What causes wildfire risk in Arizona?
Wildfire risk reflects expected annual losses to buildings, population, and agriculture from wildfire, adjusted for social vulnerability and community resilience. High scores cluster in the western US, where dry climate, fuel loads, and seasonal wind patterns combine with rapid suburban development into fire-prone terrain.