DisasterAWARE
9
Extreme

flood Flood Risk in San Jose, CA

Risk Level: Extreme — Score 9/10

FEMA: 9Historical: 10

Live Flood alert status near San Jose

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Live flood activity around San Jose — refreshed throughout the day.

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Key Risk Factors

  • FEMA rates San Jose's county as Very High risk for this hazard
  • Estimated annual loss of $720M from this hazard type
  • Frequent historical activity recorded in proximity
  • High recent activity — multiple events in the last 12 months
  • Average annual frequency: 2.1 events per year

Peak season: March-September

Last significant event: Flood - Santa Cruz County, California, United States (2026-01-05) — 42,300 people exposed

Highest Risk Cities for Floods

1
New York, NY
FEMA: 9Historical: 10
2
Los Angeles, CA
FEMA: 9Historical: 10
3
Chicago, IL
FEMA: 9Historical: 10
4
Houston, TX
FEMA: 9Historical: 10
5
Phoenix, AZ
FEMA: 9Historical: 10
6
Philadelphia, PA
FEMA: 9Historical: 10
7
San Antonio, TX
FEMA: 9Historical: 10
8
San Diego, CA
FEMA: 9Historical: 10
9
Dallas, TX
FEMA: 9Historical: 10
10
San Jose, CA
FEMA: 9Historical: 10

How San Jose Compares

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Notable Flood Events Near San Jose

DisasterAWARE's historical archive records 5 notable flood events near San Jose, ranked below by impact. The most impactful: Flood - San Francisco Bay Area, California, United States (December 2025) — 874,000 people exposed; $242,696M capital exposed.

Flood - San Francisco Bay Area, California, United States

December 24, 2025 — ADVISORY

874,000 people exposed; $242,696M capital exposed

Flood - San Mateo _ Santa Cruz Counties, California, United States

December 23, 2025 — ADVISORY

522,000 people exposed; $177,412M capital exposed

Flash Flood - San Mateo County, California, United States

December 24, 2025 — WARNING

403,000 people exposed; $127,210M capital exposed

Flood - Santa Cruz County, California, United States

January 4, 2026 — ADVISORY

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

Flood - San Mateo _ Santa Cruz, California, United States

November 12, 2025 — ADVISORY

27,500 people exposed; $2,926M capital exposed

Flood Preparedness Tips

  • 1.Know if your property is in a flood zone — check FEMA maps
  • 2.Consider flood insurance even if not in a high-risk zone
  • 3.Never drive through flooded roadways — Turn Around, Don’t Drown
  • 4.Move valuables and important documents to upper floors
  • 5.Install sump pumps and check valves in plumbing

Related Pages

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Earthquake Risk in San Jose
Score: 9/10
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Wildfire Risk in San Jose
Score: 5/10
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Hurricane Risk in San Jose
Score: 0/10
tornado
Tornado Risk in San Jose
Score: 3/10
winter-storm
Winter Storm Risk in San Jose
Score: 1/10
landslide
Landslide Risk in San Jose
Score: 7/10
extreme-heat
Extreme Heat Risk in San Jose
Score: 7/10
drought
Drought Risk in San Jose
Score: 7/10
high-wind
High Wind Risk in San Jose
Score: 1/10
tsunami
Tsunami Risk in San Jose
Score: 1/10
flood
Flood Risk in Oakland, CA
Score: 9/10
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Flood Risk in San Francisco, CA
Score: 7/10
flood
Flood Risk in Sacramento, CA
Score: 7/10

How this data is built

San Jose, CA flood risk combines Historical Event Intelligence with authoritative hazard modeling from the Geospatial Intelligence Layers catalog. Live flood monitoring is available through the Event Intelligence API and the DisasterAWARE Platform.

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