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9
Extreme

flood Flood Risk in California

Overall State Risk Score: 9/10

California faces extreme flood risk. 8 of 20 counties (40%) rated high or very high by FEMA National Risk Index.

Seasonal pattern: March-September

Highest-Risk Cities in California

1
Los Angeles, CA
Extreme · 79 historical events
FEMA: 9Historical: 10
2
San Diego, CA
Extreme · 62 historical events
FEMA: 9Historical: 10
3
San Jose, CA
Extreme · 72 historical events
FEMA: 9Historical: 10
4
Long Beach, CA
Extreme · 73 historical events
FEMA: 9Historical: 10
5
Oakland, CA
Extreme · 91 historical events
FEMA: 9Historical: 10

Notable Flood Events

Flood - San Francisco Bay Area, United States

February 15, 2026 — ADVISORY

San Francisco, CA

1,080,000 people exposed; $288,477M capital exposed

Flood - Santa Cruz County, California, United States

January 4, 2026 — ADVISORY

San Jose, CA

42,300 people exposed; $7,438M capital exposed

Flood Forecast - San Diego, United States

January 1, 2026 — ADVISORY

San Diego, CA

538,000 people exposed; $143,969M capital exposed

Flash Flood - San Diego, California, United States

December 31, 2025 — WARNING

San Diego, CA

2,140,000 people exposed; $582,824M capital exposed

Other Hazards in California

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

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