7
Very High
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 · 31 historical events
FEMA: 7Historical: 10
2San Diego, CA
Very High · 28 historical events
FEMA: 7Historical: 10
3San Jose, CA
Very High · 22 historical events
FEMA: 7Historical: 10
4Fresno, CA
Very High · 17 historical events
FEMA: 7Historical: 10
5Long Beach, CA
Very High · 28 historical events
FEMA: 7Historical: 10
6Oakland, CA
Very High · 20 historical events
FEMA: 7Historical: 10
Notable Extreme Heat Events
Cold Weather - San Francisco Bay and North Monterey Coast, United States
February 19, 2026 — ADVISORY
San Francisco, CA
4,350,000 people exposed; $1,186,959M capital exposed
Extreme Cold - San Francisco Bay Area and Interior Monterey County, California, United States
February 19, 2026 — WARNING
San Jose, CA
2,100,000 people exposed; $471,683M capital exposed
Cold Weather - North Bay and Southern Salinas Valley, California, United States
February 17, 2026 — ADVISORY
Oakland, CA
873,000 people exposed; $180,863M capital exposed
Extreme Cold - San Francisco Bay Area _ Central Coast, California, United States
January 8, 2026 — WATCH
Oakland, CA
6,570,000 people exposed; $1,689,571M capital exposed
Other Hazards in California
Monitor Extreme Heat Activity in California
Get real-time extreme heat monitoring and alerts for California with DisasterAWARE's comprehensive platform.