riskbycounty
FEMA National Risk Index

Yamhill County Disaster Risk

Yamhill County, Oregon

FEMA Risk Rating

Relatively Moderate

National Percentile

83th

of 3,144 counties

State Rank

#16

of 36 (1 = highest risk)

Flood Risk

74th

percentile

Hazard Risk Breakdown

Flood

River, coastal, and surface flooding risk

Relatively Low

Higher than 74% of US counties

Wildfire

Wildland and wildland-urban interface fire risk

Relatively Low

Higher than 52% 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 97% of US counties

Risk Advisory: Yamhill County

Risk Verdict

Yamhill County has a relatively moderate overall disaster risk profile, scoring in the 83th percentile nationally. While not in the highest tier, this county faces meaningful hazard exposure. Residents are encouraged to understand their specific risks and maintain emergency supplies.

Hazard Breakdown

Earthquake risk is the dominant hazard for Yamhill County, scoring in the 97th percentile nationally. It is followed by flood risk at the 74th percentile. Additional hazards include wildfire (52th), tornado (18th).

Preparedness Context

With earthquake risk as the top concern, Yamhill County residents should secure heavy furniture and appliances, know how to shut off utilities, and keep emergency supplies accessible. Secondary risks such as flood also warrant attention in household and community preparedness planning. FEMA recommends all households maintain at least 72 hours of food, water, and medication supplies regardless of specific hazard exposure.

Regional Context

Yamhill County is significantly riskier than the average county in Oregon. Its composite risk score is 19.4 points higher than the state average, meaning residents face above-average exposure to natural hazards compared to their neighbors.

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Frequently Asked Questions

What is the natural disaster risk in Yamhill County, OR?
Yamhill County has a FEMA National Risk Index rating of Relatively Moderate, placing it in the 83th percentile nationally out of 3,144 counties. This composite score reflects the county's overall exposure to natural hazards including floods, wildfires, tornadoes, earthquakes, and hurricanes, weighted by expected annual loss and social vulnerability.
What types of natural hazards affect Yamhill County?
Yamhill County is evaluated for five major natural hazard types: earthquake (97th percentile), flooding (74th percentile), wildfire (52th percentile), tornado (18th percentile). The highest-risk hazard is earthquake at the 97th percentile nationally. These scores are derived from FEMA's National Risk Index, which analyzes expected annual loss, social vulnerability, and community resilience for each hazard type.
How does Yamhill County risk compare to the Oregon average?
Yamhill County's composite risk percentile is 83th, compared to the Oregon state average of 63th percentile. The state's overall risk rating is Relatively Low. This means Yamhill County faces higher natural disaster risk than the typical county in Oregon.
Is Yamhill County at risk for earthquake?
Yes, Yamhill County's earthquake risk is at the 97th percentile nationally. This places it in the top quartile for this hazard type. For flooding specifically, Yamhill County is at the 74th percentile.
How is natural disaster risk measured?
FEMA's National Risk Index (NRI) calculates risk scores for 18 natural hazard types across all U.S. counties and census tracts. The composite score combines Expected Annual Loss (estimated dollar losses from each hazard), Social Vulnerability (demographic factors affecting disaster impact), and Community Resilience (ability to recover). Percentile scores rank each county against all 3,144 U.S. counties, and risk ratings range from Very Low to Very High.
Why is Yamhill County higher risk than average?
Yamhill County's composite risk score of 83th percentile is above the Oregon state average of 63th percentile. This elevated risk is driven by earthquake exposure (97th percentile), along with flooding and wildfire risk. Geographic location, terrain, climate patterns, and proximity to flood zones or fault lines all influence a county's risk profile.

Counties with Similar Risk

Umatilla County

Oregon

-0.6

Relatively Moderate

82th percentile

Benton County

Oregon

+1.5

Relatively Moderate

84th percentile

Tillamook County

Oregon

-1.5

Relatively Moderate

81th percentile

By Logan Johnson, Founder & Data EditorUpdated Reviewed by Logan Johnson, Founder & Data Editor

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.

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