Alameda County sits astride the Hayward Fault, one of the most dangerous urban faults in the United States. Seismologists consider the Hayward Fault capable of producing a magnitude 7.0 earthquake that would devastate the East Bay. The 1991 Oakland Hills Fire killed 25 people and destroyed 3,000 structures on the county's hillsides.
// Risk Intelligence
| Threat Score | 8 / 10 High Risk |
| Primary Hazard | Earthquake / Wildfire |
| Secondary Hazard | Flooding |
| FEMA Flood Zone | Zone X (Seismic High Risk) |
| Federally Declared Disasters | 50 |
| Last Major Event | Oakland Hills Fire (1991) |
| Event Frequency | Major event every 3–5 years |
// Emergency Operations
| Emergency Mgmt Phone | (510) 208-9700 |
| Emergency Shelters | 52 designated facilities |
| Evacuation Routes | I-880 South, I-580 East, I-80 West, SR-24 East |
// Recommended Preparedness Gear
Based on Alameda County CA's primary hazard profile (Earthquake / Wildfire), the following gear is recommended for a High risk area.
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// County Profile
| County | Alameda County CA |
| State | California (CA) |
| Population | 1682353 |
| Area | 821 sq miles |
| FEMA Region | Zone X (Seismic High Risk) |
// Other California Counties
Tulare County CA
Flooding / Wildfire
7/10
High
Nevada County CA
Wildfire / Flooding
7/10
High
Marin County CA
Wildfire / Earthquake
7/10
High
San Bernardino County CA
Wildfire / Earthquake
8/10
High
Riverside County CA
Wildfire / Earthquake
7/10
High
San Francisco County CA
Earthquake / Tsunami
8/10
High