Grays Harbor County Disaster Risk
Grays Harbor County, Washington
FEMA Risk Rating
Relatively High
National Percentile
97th
of 3,144 counties
State Rank
#4
of 39 (1 = highest risk)
Flood Risk
99th
percentile
Hazard Risk Breakdown
Flood
River, coastal, and surface flooding risk
Relatively High
Higher than 99% of US counties
Wildfire
Wildland and wildland-urban interface fire risk
Very Low
Higher than 34% of US counties
Tornado
Tornado and severe thunderstorm risk
Very Low
Higher than 13% 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 Grays Harbor County, Washington
Grays Harbor County's Natural Disaster Risk
Grays Harbor County scores 96.98 on the composite risk scale, earning a Relatively High rating and far exceeding Washington's state average of 70.01. The county faces some of the highest natural disaster risk in the Pacific Northwest, driven by coastal location and seismic exposure.
Where Grays Harbor Ranks in Washington
Grays Harbor County ranks among the highest-risk counties in Washington for natural disasters, with a score of 96.98 that places it near the top statewide. Only a handful of Washington counties face comparable cumulative hazard exposure.
Compared to Your Neighbors
Grays Harbor County's risk (96.98) significantly exceeds all neighboring counties, including Island (77.99), Jefferson (64.38), and inland peers. The county's coastal position creates exceptional exposure to both earthquake (98.12) and flood (99.00) hazards.
Your Top Threats: Flood and Earthquake
Flood risk reaches near-maximum at 99.00, reflecting the county's estuarine geography, tidal influence, and storm surge vulnerability from Pacific weather systems. Earthquake exposure at 98.12 is among the nation's highest due to the Cascadia Subduction Zone, while wildfire risk is relatively modest at 33.91.
Flood and Earthquake Insurance Critical
Grays Harbor County residents must prioritize flood insurance through the National Flood Insurance Program, especially in coastal and low-lying areas, and secure earthquake coverage. Ensure structures are elevated or flood-proofed, and retrofit older homes to seismic standards where feasible.
Source: FEMA National Risk Index · Narrative reviewed by Evan Brooks, Data Editor
Preparedness Guide
What to Prepare for in Grays Harbor County
Top Hazards by Exposure
Source: FEMA National Risk Index v1.19.0 · Percentiles are national (3,144 counties)
Risk Advisory: Grays Harbor County
Risk Verdict
Grays Harbor County ranks in the top tier for natural disaster risk nationally, with a composite score at the 97th percentile. Comprehensive household preparedness — including reviewing insurance, maintaining emergency supplies, and knowing evacuation routes — is strongly recommended.
Hazard Breakdown
Flood risk is Grays Harbor County's dominant natural hazard, ranked at the 99th percentile nationally under FEMA's National Risk Index. Earthquake ranks second at the 98th percentile nationally. Additional tracked hazards include wildfire (34th percentile), tornado (13th percentile).
Preparedness Context
Grays Harbor County sits at the 99th percentile nationally for flood exposure. Knowing your property's flood zone designation — available at FEMA's Flood Map Service Center — is the first step toward understanding actual exposure and insurance options. Secondary earthquake exposure at the 98th percentile adds a second preparedness layer; households should review coverage options and alert sign-up for both hazard types. Regardless of specific hazard, Grays Harbor County households benefit from a practiced communication plan: a designated out-of-state contact and a pre-agreed evacuation destination established before the season's peak risk period.
Regional Context
Compared to other Washington counties, Grays Harbor County runs 27.0 composite risk points higher than the state mean — reflecting above-average hazard concentration in this area.
Is your household prepared for Grays Harbor County's hazards?
Review FEMA's county-specific preparedness checklists and emergency planning guides.
Frequently Asked Questions
What is the natural disaster risk in Grays Harbor County, WA?
What types of natural hazards affect Grays Harbor County?
How does Grays Harbor County risk compare to the Washington average?
Is Grays Harbor County at risk for flooding?
How is natural disaster risk measured?
Why is Grays Harbor 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.