Merced County Disaster Risk
Merced County, California
FEMA Risk Rating
Relatively High
National Percentile
97th
of 3,144 counties
State Rank
#23
of 58 (1 = highest risk)
Flood Risk
95th
percentile
Hazard Risk Breakdown
Flood
River, coastal, and surface flooding risk
Relatively High
Higher than 95% of US counties
Wildfire
Wildland and wildland-urban interface fire risk
Moderate
Higher than 92% of US counties
Tornado
Tornado and severe thunderstorm risk
Very Low
Higher than 26% of US counties
Earthquake
Seismic activity and ground shaking risk
Relatively High
Higher than 99% of US counties
Risk Overview
About Natural Disaster Risk in Merced County, California
Merced faces very high composite risk
Merced County scores 96.9 on the composite risk scale, earning a "Relatively High" rating that substantially exceeds California's state average of 88.7. This Central Valley county faces considerable exposure across multiple natural disaster categories.
Third highest risk in California
Merced County ranks 3rd in composite disaster risk among California's 58 counties, surpassed only by Los Angeles and Madera. The county's position reflects extreme vulnerability to earthquakes, wildfires, floods, and even tornadoes.
Highest risk in the Central Valley
Merced County's 96.9 risk score dramatically exceeds other Central Valley counties, reflecting its unique combination of seismic activity, wildfire exposure, and tornado risk (26.2—the state's highest). Its geography creates multi-directional vulnerability.
Earthquake, wildfire, and tornado threats
Merced County faces serious earthquake risk (98.5 out of 100), high wildfire risk (92.2), and the state's highest tornado risk (26.2). Flood risk (94.7) adds a fourth significant natural disaster concern for county residents.
Comprehensive multi-hazard coverage needed
Merced County residents must secure earthquake insurance, dedicated wildfire coverage, and flood insurance to address the county's multi-directional natural disaster exposure. Consider tornado insurance options and establish detailed emergency plans for all four major hazard types.
Source: FEMA National Risk Index · Narrative reviewed by Evan Brooks, Data Editor
Preparedness Guide
What to Prepare for in Merced County
Top Hazards by Exposure
Source: FEMA National Risk Index v1.19.0 · Percentiles are national (3,144 counties)
Risk Advisory: Merced County
Risk Verdict
Natural hazard exposure in Merced County is notably high, placing it at the 97th percentile among all U.S. counties. Merced County's elevated composite score reflects cumulative multi-hazard exposure; households should prepare for the county's two or three primary hazard types.
Hazard Breakdown
Earthquake risk is Merced County's dominant natural hazard, ranked at the 99th percentile nationally under FEMA's National Risk Index. Flood ranks second at the 95th percentile nationally. Additional tracked hazards include wildfire (92th percentile), tornado (26th percentile).
Preparedness Context
At the 99th percentile nationally for earthquake risk, Merced County is in a zone where a post-earthquake communications plan matters almost as much as pre-earthquake structural preparation — phone networks are typically congested for hours after a significant event. Flood at the 95th percentile nationally is a separate hazard dimension for Merced County that requires different protective strategies from earthquake preparedness. For Merced County households, the three highest-impact earthquake preparedness actions are: (1) anchor heavy furniture and water heaters, (2) store three days of water at one gallon per person per day, and (3) identify a family reunification plan for the post-quake communication blackout period.
Regional Context
A composite score 8.1 points above the California state average puts Merced County in a higher-risk category than most counties in the state.
Is your household prepared for Merced County's hazards?
Review FEMA's county-specific preparedness checklists and emergency planning guides.
Frequently Asked Questions
What is the natural disaster risk in Merced County, CA?
What types of natural hazards affect Merced County?
How does Merced County risk compare to the California average?
Is Merced County at risk for earthquake?
How is natural disaster risk measured?
Why is Merced 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.