Extreme Heat Risk in San Diego, CA
Risk Level: Very High — Score 7/10
Live Extreme Heat alert status near San Diego
Checking live extreme heat alerts near San Diego…
refreshes every 15 minutes · DisasterAWARE live feed · all active extreme heat alerts in the US →
Live extreme heat activity around San Diego — refreshed throughout the day.
Open full-screen map →Key Risk Factors
- FEMA rates San Diego's county as Relatively High risk
- Estimated annual loss of $24M from this hazard type
- 41 events recorded in proximity in recent decades
- High recent activity — multiple events in the last 12 months
- Average annual frequency: 10.3 events per year
Peak season: June-September
Last significant event: Excessive Heat - Coastal and Inland Southern California, United States (2026-07-14) — 10,500,000 people exposed
Highest Risk Cities for Extreme Heats
How San Diego Compares
Notable Extreme Heat Events Near San Diego
DisasterAWARE's historical archive records 5 notable extreme heat events near San Diego, ranked below by impact. The most impactful: Excessive Heat - Coastal and Inland Southern California, United States (July 2026) — 10,500,000 people exposed; $2,531,927M capital exposed.
Excessive Heat - Coastal and Inland Southern California, United States
July 13, 2026 — WATCH
10,500,000 people exposed; $2,531,927M capital exposed
Excessive Heat - Coastal and Inland Southern California, United States
March 15, 2026 — WATCH
10,300,000 people exposed; $2,505,184M capital exposed
Heat - Southern California, United States
October 27, 2025 — ADVISORY
7,490,000 people exposed; $1,760,728M capital exposed
Heat - San Diego County Inland Valleys, California, United States
August 19, 2025 — ADVISORY
1,050,000 people exposed; $228,186M capital exposed
Excessive Heat - Coachella Valley; San Diego County Deserts; San Gorgonio Pass Near Banning
July 6, 2026 — 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
How this data is built
San Diego, CA extreme heat risk combines Historical Event Intelligence with authoritative hazard modeling from the Geospatial Intelligence Layers catalog. Live extreme heat monitoring is available through the Event Intelligence API and the DisasterAWARE Platform.
Monitor Extreme Heat Risk in Real Time
Get real-time extreme heat alerts for San Diego, CA and hundreds of other locations with DisasterAWARE's enterprise platform.