riskbycounty
FEMA National Risk Index

Sevier County Disaster Risk

Sevier County, Utah

FEMA Risk Rating

Very Low

National Percentile

23th

of 3,144 counties

State Rank

#16

of 29 (1 = highest risk)

Flood Risk

22th

percentile

Hazard Risk Breakdown

Flood

River, coastal, and surface flooding risk

Very Low

Higher than 22% of US counties

Wildfire

Wildland and wildland-urban interface fire risk

Relatively Low

Higher than 79% of US counties

Tornado

Tornado and severe thunderstorm risk

Very Low

Higher than 5% of US counties

Earthquake

Seismic activity and ground shaking risk

Moderate

Higher than 87% of US counties

Risk Advisory: Sevier County

Risk Verdict

Sevier County has a very low overall disaster risk profile, scoring in the 23th percentile nationally. This county is among the safer counties in the United States from a natural disaster perspective, though no area is entirely risk-free.

Hazard Breakdown

Earthquake risk is the dominant hazard for Sevier County, scoring in the 87th percentile nationally. It is followed by wildfire risk at the 79th percentile. Additional hazards include flood (22th), tornado (5th).

Preparedness Context

With earthquake risk as the top concern, Sevier County residents should secure heavy furniture and appliances, know how to shut off utilities, and keep emergency supplies accessible. Secondary risks such as wildfire 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

Sevier County is notably safer than the average county in Utah. Its composite risk score is 13.4 points lower than the state average, indicating below-average exposure to natural hazards relative to other counties in the state.

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Frequently Asked Questions

What is the natural disaster risk in Sevier County, UT?
Sevier County has a FEMA National Risk Index rating of Very Low, placing it in the 23th 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 Sevier County?
Sevier County is evaluated for five major natural hazard types: earthquake (87th percentile), wildfire (79th percentile), flooding (22th percentile), tornado (5th percentile). The highest-risk hazard is earthquake at the 87th 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 Sevier County risk compare to the Utah average?
Sevier County's composite risk percentile is 23th, compared to the Utah state average of 36th percentile. The state's overall risk rating is Very Low. This means Sevier County faces lower natural disaster risk than the typical county in Utah.
Is Sevier County at risk for earthquake?
Yes, Sevier County's earthquake risk is at the 87th percentile nationally. This places it in the top quartile for this hazard type. For flooding specifically, Sevier County is at the 22th 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.
Is Sevier County a safe place to live?
Sevier County's composite risk score of 23th percentile is below the Utah state average of 36th percentile, indicating relatively lower exposure to natural hazards. However, no county is completely risk-free. The primary hazard type is earthquake at the 87th percentile. Residents should still maintain emergency preparedness plans and appropriate insurance coverage.

Counties with Similar Risk

Millard County

Utah

-0.6

Very Low

22th percentile

San Juan County

Utah

+4.1

Very Low

27th percentile

Juab County

Utah

-7.4

Very Low

15th 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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