9
Extreme
Extreme Heat Risk in Arizona
Overall State Risk Score: 9/10
Arizona faces extreme extreme-heat risk. 7 of 15 counties (47%) rated high or very high by FEMA National Risk Index.
Seasonal pattern: June-September
Highest-Risk Cities in Arizona
Notable Extreme Heat Events
Excessive Heat - Sonoran Desert Region, Arizona, United States
August 19, 2025 — WARNING
Mesa, AZ
1,030,000 people exposed; $70,479M capital exposed
Excessive Heat - Southwest Arizona and Southeast California, United States
August 19, 2025 — WARNING
Mesa, AZ
5,720,016 people exposed; $642,708M capital exposed
Extreme Heat - Arizona Desert, United States
June 14, 2022 — WARNING
Mesa, AZ
Impact data not available
Other Hazards in Arizona
Monitor Extreme Heat Activity in Arizona
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