Natural Disaster Risk in San Lorenzo
California
Risk Summary for San Lorenzo
San Lorenzo scores 6.6/10 (High risk), above the U.S. average of 4.5. The leading hazard is Earthquake.
Top Hazards
All 18 Hazard Scores
How it compares
Live Conditions
🏠 What this means for insurance
Above-average risk — check your policy limits
Standard homeowners insurance may not fully cover all hazards rated highly in this area. Verify that your policy includes adequate coverage for the top local hazards, and ask your insurer about specific endorsements or separate policies (e.g., flood, earthquake).
This is general information only. Consult a licensed insurance professional for advice specific to your property.
Natural Hazard Profile: San Lorenzo, California
San Lorenzo, in Alameda County, is a city of approximately 29,420 residents situated in the western mountain region near the Pacific Coast. Its Mediterranean climate brings dry summers and mild, wet winters with pronounced drought cycles, and in particular a critical fire season from late summer through fall. These conditions collectively define the natural hazard environment that San Lorenzo residents and property owners must navigate.
According to FEMA's National Risk Index, San Lorenzo carries an overall risk score of 6.6/10, placing it in the high category. Seismic activity is the dominant hazard, with the community situated in or near an active tectonic zone capable of producing damaging ground shaking. The area also faces notable exposure to landslide and tsunami.
Within California, San Lorenzo's risk is, slightly above the 5.9/10 state average. Nationally, it ranks well above the U.S. national average of 4.5/10. FEMA's analysis of Alameda County identifies earthquake as the foremost hazard, followed by landslide and tsunami. These rankings reflect the relative frequency and severity of each hazard type in the local environment.
San Lorenzo's high risk designation reflects meaningful exposure to natural hazards. Residents should verify that their insurance covers the area's primary risks, prepare a family emergency plan, and stay informed about seasonal hazard peaks through local weather and emergency management services.
What this means for San Lorenzo: Earthquake preparedness
- Identify "drop, cover, and hold on" spots in each room and keep an emergency kit with water for at least 72 hours.
- Standard homeowners insurance excludes earthquake damage — a separate earthquake policy or endorsement is needed.
- Secure heavy furniture, water heaters, and shelving to wall studs to reduce injury and damage during shaking.
Local Factors for San Lorenzo
These city-level factors differentiate San Lorenzo from other communities in Alameda County and provide geographic context for its hazard exposure.
Population
29,420
SuburbanGeographic Zone
Pacific Coast
Tsunami, coastal flood & wildfire risk
Climate Band
Moderate Continental
Latitude 37.7°
Flood Terrain
Minimal — county topography limits flood risk
Flood score: 1.0/10
Wildfire Exposure
High — long dry fire season
Fire score: 9.8/10
Coordinates
37.6780° N, 122.1333° W
Alameda County
Population and coordinates from SimpleMaps US Cities data. Hazard scores from FEMA National Risk Index. Geographic classification derived from coordinates.
Recent Climate Data for San Lorenzo
Last 12 months · Source: Open-Meteo archive
Notable Weather Days (last 12 months)
ZIP Codes in San Lorenzo
Other cities in California
Data source: FEMA National Risk Index (NRI). Scores normalized to 1–10 across all US counties. City scores inherit county-level FEMA data. For informational purposes only.