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
Notable Flood Events
Flash Flood - San Diego, California, United States
January 1, 2026 — WARNING
San Diego, CA
2,140,000 people exposed; $582,824M capital exposed
Flash Flood - Central California, United States
December 24, 2025 — WARNING
Fresno, CA
658,000 people exposed; $163,975M capital exposed
Flood Forecast - San Diego, California, United States
January 1, 2026 — WARNING
San Diego, CA
538,000 people exposed; $143,969M capital exposed
Other Hazards in California
How this data is built
California flood 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 Flood Activity in California
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