riskbycounty
FEMA National Risk Index

Clermont County Disaster Risk

Clermont County, Ohio

FEMA Risk Rating

Relatively Low

National Percentile

78th

of 3,144 counties

State Rank

#14

of 88 (1 = highest risk)

Flood Risk

81th

percentile

Hazard Risk Breakdown

Flood

River, coastal, and surface flooding risk

Moderate

Higher than 81% of US counties

Wildfire

Wildland and wildland-urban interface fire risk

Very Low

Higher than 41% of US counties

Tornado

Tornado and severe thunderstorm risk

Moderate

Higher than 84% of US counties

Earthquake

Seismic activity and ground shaking risk

Relatively Low

Higher than 78% of US counties

Hurricane

Tropical cyclone and hurricane risk

Very Low

Higher than 21% of US counties

Risk Advisory: Clermont County

Risk Verdict

Clermont County shows a relatively low overall disaster risk profile, scoring in the 78th percentile nationally. The county faces moderate hazard exposure relative to other U.S. counties. Standard emergency preparedness is recommended, with attention to the specific hazards that dominate locally.

Hazard Breakdown

Tornado risk is the dominant hazard for Clermont County, scoring in the 84th percentile nationally. It is followed by flood risk at the 81th percentile. Additional hazards include earthquake (78th), wildfire (41th), hurricane (21th).

Preparedness Context

With tornado risk as the top concern, Clermont County residents should identify a safe room or interior space on the lowest floor, have a NOAA weather radio, and practice tornado drills with your household. 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

Clermont County is significantly riskier than the average county in Ohio. Its composite risk score is 22.8 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 Clermont County, OH?
Clermont County has a FEMA National Risk Index rating of Relatively Low, placing it in the 78th 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 Clermont County?
Clermont County is evaluated for five major natural hazard types: tornado (84th percentile), flooding (81th percentile), earthquake (78th percentile), wildfire (41th percentile), hurricane (21th percentile). The highest-risk hazard is tornado at the 84th 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 Clermont County risk compare to the Ohio average?
Clermont County's composite risk percentile is 78th, compared to the Ohio state average of 55th percentile. The state's overall risk rating is Relatively Low. This means Clermont County faces higher natural disaster risk than the typical county in Ohio.
Is Clermont County at risk for tornado?
Yes, Clermont County's tornado risk is at the 84th percentile nationally. This places it in the top quartile for this hazard type. For flooding specifically, Clermont County is at the 81th 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 Clermont County higher risk than average?
Clermont County's composite risk score of 78th percentile is above the Ohio state average of 55th percentile. This elevated risk is driven by tornado exposure (84th percentile), along with flooding and earthquake 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

Warren County

Ohio

-0.1

Relatively Low

78th percentile

Lake County

Ohio

-0.5

Relatively Low

77th percentile

Clark County

Ohio

-0.8

Relatively Low

77th 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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