riskbycounty
FEMA National Risk Index

St. Clair County Disaster Risk

St. Clair County, Missouri

FEMA Risk Rating

Very Low

National Percentile

26th

of 3,144 counties

State Rank

#93

of 115 (1 = highest risk)

Flood Risk

36th

percentile

Hazard Risk Breakdown

Flood

River, coastal, and surface flooding risk

Very Low

Higher than 36% of US counties

Wildfire

Wildland and wildland-urban interface fire risk

Relatively Low

Higher than 53% of US counties

Tornado

Tornado and severe thunderstorm risk

Very Low

Higher than 36% of US counties

Earthquake

Seismic activity and ground shaking risk

Very Low

Higher than 42% of US counties

Hurricane

Tropical cyclone and hurricane risk

Very Low

Higher than 20% of US counties

Risk Advisory: St. Clair County

Risk Verdict

St. Clair County has a very low overall disaster risk profile, scoring in the 26th 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

Wildfire risk is the dominant hazard for St. Clair County, scoring in the 53th percentile nationally. It is followed by earthquake risk at the 42th percentile. Additional hazards include tornado (36th), flood (36th), hurricane (20th).

Preparedness Context

With wildfire risk as the top concern, St. Clair County residents should create defensible space around your property, sign up for local emergency alerts, and prepare a go-bag with essential documents and medications. Secondary risks such as earthquake 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

St. Clair County is notably safer than the average county in Missouri. Its composite risk score is 24.9 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 St. Clair County, MO?
St. Clair County has a FEMA National Risk Index rating of Very Low, placing it in the 26th 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 St. Clair County?
St. Clair County is evaluated for five major natural hazard types: wildfire (53th percentile), earthquake (42th percentile), tornado (36th percentile), flooding (36th percentile), hurricane (20th percentile). The highest-risk hazard is wildfire at the 53th 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 St. Clair County risk compare to the Missouri average?
St. Clair County's composite risk percentile is 26th, compared to the Missouri state average of 51th percentile. The state's overall risk rating is Relatively Low. This means St. Clair County faces lower natural disaster risk than the typical county in Missouri.
Is St. Clair County at risk for wildfire?
Yes, St. Clair County's wildfire risk is at the 53th percentile nationally. This is above the national median. For flooding specifically, St. Clair County is at the 36th 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 St. Clair County a safe place to live?
St. Clair County's composite risk score of 26th percentile is below the Missouri state average of 51th percentile, indicating relatively lower exposure to natural hazards. However, no county is completely risk-free. The primary hazard type is wildfire at the 53th percentile. Residents should still maintain emergency preparedness plans and appropriate insurance coverage.

Counties with Similar Risk

Cedar County

Missouri

+0.4

Very Low

26th percentile

Bollinger County

Missouri

+0.6

Very Low

26th percentile

Lewis County

Missouri

+1.7

Very Low

27th 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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