riskbycounty
FEMA National Risk Index

Salt Lake County Disaster Risk

Salt Lake County, Utah

FEMA Risk Rating

Relatively High

National Percentile

99th

of 3,144 counties

State Rank

#1

of 29 (1 = highest risk)

Flood Risk

93th

percentile

Hazard Risk Breakdown

Flood

River, coastal, and surface flooding risk

Moderate

Higher than 93% of US counties

Wildfire

Wildland and wildland-urban interface fire risk

Relatively High

Higher than 98% of US counties

Tornado

Tornado and severe thunderstorm risk

Relatively Low

Higher than 71% of US counties

Earthquake

Seismic activity and ground shaking risk

Very High

Higher than 100% of US counties

Risk Advisory: Salt Lake County

Risk Verdict

Salt Lake County carries a relatively high overall disaster risk profile, scoring in the 99th percentile nationally. This places it among the most at-risk counties in the United States. Residents should prioritize comprehensive emergency preparedness, including reviewing insurance coverage and having an evacuation plan.

Hazard Breakdown

Earthquake risk is the dominant hazard for Salt Lake County, scoring in the 100th percentile nationally. It is followed by wildfire risk at the 98th percentile. Additional hazards include flood (93th), tornado (71th).

Preparedness Context

With earthquake risk as the top concern, Salt Lake 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

Salt Lake County is significantly riskier than the average county in Utah. Its composite risk score is 62.4 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 Salt Lake County, UT?
Salt Lake County has a FEMA National Risk Index rating of Relatively High, placing it in the 99th 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 Salt Lake County?
Salt Lake County is evaluated for five major natural hazard types: earthquake (100th percentile), wildfire (98th percentile), flooding (93th percentile), tornado (71th percentile). The highest-risk hazard is earthquake at the 100th 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 Salt Lake County risk compare to the Utah average?
Salt Lake County's composite risk percentile is 99th, compared to the Utah state average of 36th percentile. The state's overall risk rating is Very Low. This means Salt Lake County faces higher natural disaster risk than the typical county in Utah.
Is Salt Lake County at risk for earthquake?
Yes, Salt Lake County's earthquake risk is at the 100th percentile nationally. This places it in the top quartile for this hazard type. For flooding specifically, Salt Lake County is at the 93th 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 Salt Lake County higher risk than average?
Salt Lake County's composite risk score of 99th percentile is above the Utah state average of 36th percentile. This elevated risk is driven by earthquake exposure (100th percentile), along with wildfire and flooding and tornado 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

Utah County

Utah

-3.2

Relatively High

95th percentile

Washington County

Utah

-5.8

Relatively Moderate

93th percentile

Davis County

Utah

-10.8

Relatively Moderate

88th 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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