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9
Extreme

extreme-heat Extreme Heat Risk in Phoenix, AZ

Risk Level: Extreme — Score 9/10

FEMA: 9Historical: 10

Key Risk Factors

  • FEMA rates Phoenix's county as Very High risk for this hazard
  • Estimated annual loss of $958M from this hazard type
  • 6 events on record in proximity
  • 4 event(s) in the last 12 months
  • Average annual frequency: 19.8 events per year

Peak season: June-September

Last significant event: Excessive Heat - Sonoran Desert Region, Arizona, United States (2025-08-20) — 1,030,000 people exposed

Highest Risk Cities for Extreme Heats

1
FEMA: 9Historical: 8
2
FEMA: 9Historical: 0
3
Phoenix, AZ
FEMA: 9Historical: 10
4
FEMA: 9Historical: 10
5
FEMA: 9Historical: 10
6
FEMA: 9Historical: 10
7
FEMA: 9Historical: 0
8
FEMA: 9Historical: 10
9
FEMA: 7Historical: 10
10
FEMA: 7Historical: 10

How Phoenix Compares

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Notable Extreme Heat Events Near Phoenix

Excessive Heat - Sonoran Desert Region, Arizona, United States

August 19, 2025 WARNING

1,030,000 people exposed; $70,479M capital exposed

Extreme Heat - Arizona Desert, United States

June 14, 2022 WARNING

Impact data not available

Extreme Heat - Southwest United States

June 24, 2025 WARNING

5,966,290 people exposed; $663,297M capital exposed

Exterme Heat - Western United States

June 8, 2025 WARNING

6,795,200 people exposed; $717,822M capital exposed

Extreme Heat - Southwest United States

July 6, 2025 WARNING

6,310,100 people exposed; $755,060M capital exposed

Extreme Heat Preparedness Tips

  • 1.Stay hydrated — drink water regularly even if you don’t feel thirsty
  • 2.Avoid outdoor activities during peak heat hours (10 AM – 4 PM)
  • 3.Know the signs of heat exhaustion and heat stroke
  • 4.Check on elderly neighbors and those without air conditioning
  • 5.Never leave children or pets in a parked vehicle

Related Pages

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