San Mateo County on the San Francisco Peninsula sits on multiple active fault systems including the San Andreas Fault which runs directly through the county. San Francisco International Airport — one of the busiest airports in the US — is located in San Mateo County creating critical aviation emergency planning requirements. The county hosts major technology company headquarters in Silicon Valley's northern extension. Coastal communities face sea level rise flooding and tsunami risk.
// Recommended Supplies
Essential gear for power outages, severe weather, and emergency situations in your area.
- Emergency Food Supplies
- Water Filtration & Storage
- Backup Generator
- Solar Backup Power
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// Risk Intelligence
| Threat Score | 7 / 10 High Risk |
| Primary Hazard | Earthquake / Wildfire |
| Secondary Hazard | Coastal Flooding |
| FEMA Flood Zone | High |
| Federally Declared Disasters | 6 |
| Last Major Event | 2021 Coastal Flooding |
| Event Frequency | Annual |
// Emergency Operations
| Emergency Mgmt Phone | (650) 363-4000 |
| Emergency Shelters | 16 designated facilities |
| Evacuation Routes | US-101 I-280 CA-92 CA-35 |
// County Profile
| County | San Mateo County CA |
| State | California (CA) |
| Population | 764 |
| Area | 449 sq miles |
| FEMA Region | High |
// Major Cities
// Cities in This County
// Other California Counties
// Nearby Infrastructure Risks
Critical infrastructure facilities within or near this area that could affect civilian safety during emergencies, conflict, or infrastructure failures.
Infrastructure risk data is for emergency preparedness awareness. Facility locations are publicly known. Always follow official emergency guidance.