Napa County Disaster Risk
Napa County, California
FEMA Risk Rating
Relatively High
National Percentile
95th
of 3,144 counties
State Rank
#29
of 58 (1 = highest risk)
Flood Risk
96th
percentile
Hazard Risk Breakdown
Flood
River, coastal, and surface flooding risk
Relatively High
Higher than 96% of US counties
Wildfire
Wildland and wildland-urban interface fire risk
Relatively High
Higher than 96% of US counties
Tornado
Tornado and severe thunderstorm risk
Very Low
Higher than 18% of US counties
Earthquake
Seismic activity and ground shaking risk
Relatively High
Higher than 98% of US counties
Risk Overview
About Natural Disaster Risk in Napa County, California
Napa: Well Above National Disaster Risk
Napa County's composite risk score of 95.26 ranks it as relatively high and significantly exceeds the national average. This wine-country region and Bay Area gateway faces major exposure across multiple natural hazard types.
High-Risk Status Within California
Napa's score of 95.26 sits well above California's state average of 88.72, reflecting its exposure to seismic, wildfire, and flood hazards. It ranks among the state's most-at-risk counties.
Comparable Risk to Other Bay Area Counties
Napa's score of 95.26 aligns closely with Sonoma and Contra Costa counties, all sitting in the 90+ range. These Bay Area neighbors share seismic vulnerability and wildfire exposure.
Earthquake, Wildfire, and Flood Dominate
Napa's earthquake risk reaches 98.38, wildfire risk scores 95.96, and flood risk comes in at 95.83—a triple threat. Tornado risk is lower at 18.29 but still notable for the region.
Multi-Hazard Insurance Strategy Required
Napa residents should purchase separate earthquake and flood insurance, as neither is covered by standard homeowners policies. Given wildfire risk of 95.96, verify your fire coverage is adequate and consider defensible space improvements around your home.
Source: FEMA National Risk Index · Narrative reviewed by Evan Brooks, Data Editor
Preparedness Guide
What to Prepare for in Napa County
Top Hazards by Exposure
Source: FEMA National Risk Index v1.19.0 · Percentiles are national (3,144 counties)
Risk Advisory: Napa County
Risk Verdict
Napa County carries an elevated natural disaster risk burden, scoring at the 95th percentile nationally under FEMA's risk model. This risk level calls for more than general awareness: insurance coverage review, a family communication plan, and a prepared go-bag are practical priorities.
Hazard Breakdown
Earthquake risk is Napa County's dominant natural hazard, ranked at the 98th percentile nationally under FEMA's National Risk Index. Wildfire ranks second at the 96th percentile nationally. Additional tracked hazards include flood (96th percentile), tornado (18th percentile).
Preparedness Context
Earthquake risk is Napa County's leading natural hazard, ranked at the 98th percentile nationally. Securing tall furniture, water heaters, and bookcases to walls with anti-tip hardware is among the simplest and most effective life-safety measures households can take. The county's wildfire risk at the 96th percentile nationally is a seasonal consideration alongside the year-round earthquake threat, requiring awareness of both hazard types. Napa County residents should locate the main gas shutoff valve and keep an appropriate wrench nearby — gas leaks cause a significant share of earthquake-related injuries and fires, and the shutoff step is safe to take immediately after shaking stops.
Regional Context
Napa County's composite risk score sits 6.5 points above the California county average, placing it among the more hazard-exposed counties in the state.
Is your household prepared for Napa County's hazards?
Review FEMA's county-specific preparedness checklists and emergency planning guides.
Frequently Asked Questions
What is the natural disaster risk in Napa County, CA?
What types of natural hazards affect Napa County?
How does Napa County risk compare to the California average?
Is Napa County at risk for earthquake?
How is natural disaster risk measured?
Why is Napa County higher risk than average?
Data Source
Risk data sourced from the FEMA National Risk Index (NRI). Risk scores are relative rankings (0–100) across all US counties — not absolute risk measures. Higher scores indicate higher relative risk compared to other counties.
Disclaimer: This data is informational only. It is not financial, insurance, or legal advice. Always consult a qualified professional before making insurance or real estate decisions.