DisasterAWARE
7
Very High

extreme-heat Extreme Heat Risk in California

Overall State Risk Score: 7/10

California faces very high extreme-heat risk. 17 of 58 counties (29%) rated high or very high by FEMA National Risk Index.

Seasonal pattern: June-September

Highest-Risk Cities in California

1
Los Angeles, CA
Very High · 39 historical events
FEMA: 7Historical: 10
2
San Diego, CA
Very High · 41 historical events
FEMA: 7Historical: 10
3
San Jose, CA
Very High · 25 historical events
FEMA: 7Historical: 10
4
Fresno, CA
Very High · 21 historical events
FEMA: 7Historical: 10
5
Long Beach, CA
Very High · 37 historical events
FEMA: 7Historical: 10
6
Oakland, CA
Very High · 23 historical events
FEMA: 7Historical: 10

Notable Extreme Heat Events

Excessive Heat - Coachella Valley; San Diego County Deserts; San Gorgonio Pass Near Banning

July 6, 2026 — WARNING

San Diego, CA

613,000 people exposed; $114,866M capital exposed

Other Hazards in California

earthquake
Earthquake Risk
Score: 9/10
wildfire
Wildfire Risk
Score: 9/10
hurricane
Hurricane Risk
Score: 1/10
flood
Flood Risk
Score: 9/10
tornado
Tornado Risk
Score: 5/10
winter-storm
Winter Storm Risk
Score: 7/10
landslide
Landslide Risk
Score: 7/10
drought
Drought Risk
Score: 9/10
high-wind
High Wind Risk
Score: 5/10
tsunami
Tsunami Risk
Score: 9/10

How this data is built

California extreme heat risk combines Historical Event Intelligence with authoritative hazard modeling from the Geospatial Intelligence Layers catalog. Live event monitoring is available through the Event Intelligence API and the DisasterAWARE Platform.

Monitor Extreme Heat Activity in California

Get real-time extreme heat monitoring and alerts for California with DisasterAWARE's comprehensive platform.

Start Free TrialTalk to Expert