7
Very High
Extreme Heat Risk in San Diego, CA
Risk Level: Very High — Score 7/10
FEMA: 7Historical: 10
Key Risk Factors
- FEMA rates San Diego's county as Relatively High risk
- Estimated annual loss of $24M from this hazard type
- 4 events on record in proximity
- 4 event(s) in the last 12 months
- Average annual frequency: 10.3 events per year
Peak season: June-September
Last significant event: Heat - Southern California, United States (2025-10-28) — 7,490,000 people exposed
Highest Risk Cities for Extreme Heats
San Diego is not in the top 10 for extreme heat risk among tracked cities.
How San Diego Compares
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Notable Extreme Heat Events Near San Diego
Heat - San Diego County Inland Valleys, California, United States
August 19, 2025 — ADVISORY
1,050,000 people exposed; $228,186M capital exposed
Heat - Southern California, United States
October 27, 2025 — ADVISORY
7,490,000 people exposed; $1,760,728M capital exposed
Heat - Southern California, United States
August 31, 2025 — ADVISORY
7,510,000 people exposed; $1,762,829M capital exposed
Excessive Heat - Southern California, United States
August 19, 2025 — WARNING
613,000 people exposed; $114,866M 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
Earthquake Risk in San Diego
Score: 7/10
Wildfire Risk in San Diego
Score: 9/10
Hurricane Risk in San Diego
Score: 1/10
Flood Risk in San Diego
Score: 9/10
Tornado Risk in San Diego
Score: 3/10
Winter Storm Risk in San Diego
Score: 3/10
Landslide Risk in San Diego
Score: 7/10
Drought Risk in San Diego
Score: 3/10
High Wind Risk in San Diego
Score: 5/10
Tsunami Risk in San Diego
Score: 3/10
Extreme Heat Risk in Long Beach, CA
Score: 7/10
Extreme Heat Risk in Los Angeles, CA
Score: 7/10
Extreme Heat Risk in Las Vegas, NV
Score: 9/10
Monitor Extreme Heat Risk in Real Time
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