Compare 16 cities using FEMA's relative heat wave scores and annualized frequency for the county-equivalent areas shown.
Highest relative score
99.8/100
Maricopa County
Covered cities: Avondale, Buckeye, Chandler, Gilbert, Glendale, Goodyear, Mesa, Peoria, Phoenix, Scottsdale, Surprise, and Tempe
Lowest relative score in this set
53.5/100
Yavapai County
Covered cities: Prescott Valley
These are relative FEMA scores for county-equivalent areas. They are not annual probabilities or property-level findings.
Cities sharing a FEMA area are grouped together and receive the same score.
| Rank | FEMA area and cities | Rating | Score | Annualized frequency |
|---|---|---|---|---|
| #1 | Maricopa County | Very High | 99.8/100 | 15.752 per year |
| #2 | Pima County | Relatively High | 99.1/100 | 4.858 per year |
| #3 | Pinal County | Relatively High | 98.8/100 | 9.159 per year |
| #4 | Yuma County | Relatively Moderate | 95.0/100 | 13.183 per year |
| #5 | Yavapai County | Relatively Low | 53.5/100 | 3.096 per year |
Occurrence thresholds vary by hazard. The FEMA methodology defines the value for each hazard.
Avondale, Buckeye, Chandler, Gilbert, Glendale, Goodyear, Mesa, Peoria, Phoenix, Scottsdale, Surprise, and Tempe use FEMA data for Maricopa County, which has the highest relative heat wave score in this covered set at 99.8/100. Cities sharing the same FEMA area share the same score.
Yavapai County has the lowest score in this covered set at 53.5/100. This is a relative FEMA comparison, not a declaration that every property there is safe.
No. The city links provide geographic navigation, while the scores and frequencies cover the FEMA county-equivalent areas shown in the table. Address-level conditions require local maps and property details.
No. The relative score compares FEMA areas on a 0–100 scale. Annualized frequency appears separately with hazard-specific units.
Source: FEMA National Risk Index v1.19.0, released March 2023. Hazard data covers FEMA county-equivalent areas.