riskbycounty
FEMA National Risk Index

Dyer County Disaster Risk

Dyer County, Tennessee

FEMA Risk Rating

Relatively Moderate

National Percentile

87th

of 3,144 counties

State Rank

#9

of 95 (1 = highest risk)

Flood Risk

38th

percentile

Hazard Risk Breakdown

Flood

River, coastal, and surface flooding risk

Very Low

Higher than 38% of US counties

Wildfire

Wildland and wildland-urban interface fire risk

Very Low

Higher than 25% of US counties

Tornado

Tornado and severe thunderstorm risk

Moderate

Higher than 88% of US counties

Earthquake

Seismic activity and ground shaking risk

Relatively High

Higher than 98% of US counties

Hurricane

Tropical cyclone and hurricane risk

Relatively Low

Higher than 52% of US counties

Risk Advisory: Dyer County

Risk Verdict

Dyer County has a relatively moderate overall disaster risk profile, scoring in the 87th percentile nationally. While not in the highest tier, this county faces meaningful hazard exposure. Residents are encouraged to understand their specific risks and maintain emergency supplies.

Hazard Breakdown

Earthquake risk is the dominant hazard for Dyer County, scoring in the 98th percentile nationally. It is followed by tornado risk at the 88th percentile. Additional hazards include hurricane (52th), flood (38th), wildfire (25th).

Preparedness Context

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

Dyer County is significantly riskier than the average county in Tennessee. Its composite risk score is 34.1 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 Dyer County, TN?
Dyer County has a FEMA National Risk Index rating of Relatively Moderate, placing it in the 87th 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 Dyer County?
Dyer County is evaluated for five major natural hazard types: earthquake (98th percentile), tornado (88th percentile), hurricane (52th percentile), flooding (38th percentile), wildfire (25th percentile). The highest-risk hazard is earthquake at the 98th 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 Dyer County risk compare to the Tennessee average?
Dyer County's composite risk percentile is 87th, compared to the Tennessee state average of 53th percentile. The state's overall risk rating is Relatively Low. This means Dyer County faces higher natural disaster risk than the typical county in Tennessee.
Is Dyer County at risk for earthquake?
Yes, Dyer County's earthquake risk is at the 98th percentile nationally. This places it in the top quartile for this hazard type. For flooding specifically, Dyer County is at the 38th 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 Dyer County higher risk than average?
Dyer County's composite risk score of 87th percentile is above the Tennessee state average of 53th percentile. This elevated risk is driven by earthquake exposure (98th percentile), along with tornado and hurricane 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

Gibson County

Tennessee

-0.6

Relatively Moderate

86th percentile

Montgomery County

Tennessee

+0.8

Relatively Moderate

87th percentile

Sumner County

Tennessee

+1.1

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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