riskbycounty
FEMA National Risk Index

Allen County Disaster Risk

Allen County, Ohio

FEMA Risk Rating

Relatively Low

National Percentile

73th

of 3,144 counties

State Rank

#20

of 88 (1 = highest risk)

Flood Risk

83th

percentile

Hazard Risk Breakdown

Flood

River, coastal, and surface flooding risk

Moderate

Higher than 83% of US counties

Wildfire

Wildland and wildland-urban interface fire risk

Very Low

Higher than 9% of US counties

Tornado

Tornado and severe thunderstorm risk

Relatively Low

Higher than 74% of US counties

Earthquake

Seismic activity and ground shaking risk

Moderate

Higher than 83% of US counties

Hurricane

Tropical cyclone and hurricane risk

Relatively Low

Higher than 47% of US counties

Risk Advisory: Allen County

Risk Verdict

Allen County shows a relatively low overall disaster risk profile, scoring in the 73th 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

Earthquake risk is the dominant hazard for Allen County, scoring in the 83th percentile nationally. It is followed by flood risk at the 83th percentile. Additional hazards include tornado (74th), hurricane (47th), wildfire (9th).

Preparedness Context

With earthquake risk as the top concern, Allen 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

Allen County is significantly riskier than the average county in Ohio. Its composite risk score is 18.3 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 Allen County, OH?
Allen County has a FEMA National Risk Index rating of Relatively Low, placing it in the 73th 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 Allen County?
Allen County is evaluated for five major natural hazard types: earthquake (83th percentile), flooding (83th percentile), tornado (74th percentile), hurricane (47th percentile), wildfire (9th percentile). The highest-risk hazard is earthquake at the 83th 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 Allen County risk compare to the Ohio average?
Allen County's composite risk percentile is 73th, compared to the Ohio state average of 55th percentile. The state's overall risk rating is Relatively Low. This means Allen County faces higher natural disaster risk than the typical county in Ohio.
Is Allen County at risk for earthquake?
Yes, Allen County's earthquake risk is at the 83th percentile nationally. This places it in the top quartile for this hazard type. For flooding specifically, Allen County is at the 83th 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 Allen County higher risk than average?
Allen County's composite risk score of 73th percentile is above the Ohio state average of 55th percentile. This elevated risk is driven by earthquake exposure (83th percentile), along with 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

Fairfield County

Ohio

-0.7

Relatively Low

73th percentile

Belmont County

Ohio

+1.8

Relatively Low

75th percentile

Greene County

Ohio

+2.3

Relatively Low

76th 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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