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
Notable Extreme Heat Events
Excessive Heat - Coachella Valley; San Diego County Deserts; San Gorgonio Pass Near Banning
July 7, 2026 — WARNING
San Diego, CA
613,000 people exposed; $114,866M capital exposed
Other Hazards in California
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.
The data behind this page
Every score and event here comes from DisasterAWARE's hazard database — available as downloadable historical datasets and a real-time API.
Monitor Extreme Heat Activity in California
Get real-time extreme heat monitoring and alerts for California with DisasterAWARE's comprehensive platform.