Extreme Heat Risk in San Jose, CA
Risk Level: Very High — Score 7/10
Live Extreme Heat alert status near San Jose
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Live extreme heat activity around San Jose — refreshed throughout the day.
Open full-screen map →Key Risk Factors
- FEMA rates San Jose's county as Relatively High risk
- Estimated annual loss of $23M from this hazard type
- 25 events recorded in proximity in recent decades
- Active in the last 12 months (19 events)
- Average annual frequency: 8.0 events per year
Peak season: June-September
Last significant event: Extreme Cold - San Francisco Bay Area and Interior Monterey County, California, United States (2026-02-20) — 2,100,000 people exposed
Highest Risk Cities for Extreme Heats
How San Jose Compares
Notable Extreme Heat Events Near San Jose
DisasterAWARE's historical archive records 5 notable extreme heat events near San Jose, ranked below by impact. The most impactful: Extreme Cold - San Francisco Bay Area _ Central Coast, California, United States (January 2026) — 6,570,000 people exposed; $1,689,571M capital exposed.
Extreme Cold - San Francisco Bay Area _ Central Coast, California, United States
January 8, 2026 — WATCH
6,570,000 people exposed; $1,689,571M capital exposed
Extreme Cold - San Francisco Bay Area and Interior Monterey County, California, United States
February 19, 2026 — WARNING
2,100,000 people exposed; $471,683M capital exposed
Extreme Cold - San Francisco Bay Area and Central Coast, California, United States
February 19, 2026 — WARNING
2,100,000 people exposed; $471,683M capital exposed
Cold Weather - North Bay and Southern Salinas Valley, California, United States
February 17, 2026 — ADVISORY
873,000 people exposed; $180,863M capital exposed
Heat Advisory - California, United States
June 7, 2015 — ADVISORY
Impact data not available
Extreme Heat Preparedness Tips
- 1.Stay hydrated — drink water regularly even if you don’t feel thirsty
- 2.Avoid outdoor activities during peak heat hours (10 AM – 4 PM)
- 3.Know the signs of heat exhaustion and heat stroke
- 4.Check on elderly neighbors and those without air conditioning
- 5.Never leave children or pets in a parked vehicle
Related Pages
How this data is built
San Jose, CA extreme heat risk combines Historical Event Intelligence with authoritative hazard modeling from the Geospatial Intelligence Layers catalog. Live extreme heat monitoring is available through the Event Intelligence API and the DisasterAWARE Platform.
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