riskbycounty
FEMA National Risk Index

Greene County Disaster Risk

Greene County, Tennessee

FEMA Risk Rating

Relatively Low

National Percentile

56th

of 3,144 counties

State Rank

#48

of 95 (1 = highest risk)

Flood Risk

64th

percentile

Hazard Risk Breakdown

Flood

River, coastal, and surface flooding risk

Relatively Low

Higher than 64% of US counties

Wildfire

Wildland and wildland-urban interface fire risk

Relatively Low

Higher than 45% of US counties

Tornado

Tornado and severe thunderstorm risk

Relatively Low

Higher than 62% of US counties

Earthquake

Seismic activity and ground shaking risk

Moderate

Higher than 84% of US counties

Hurricane

Tropical cyclone and hurricane risk

Relatively Low

Higher than 49% of US counties

Risk Advisory: Greene County

Risk Verdict

Greene County shows a relatively low overall disaster risk profile, scoring in the 56th 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 Greene County, scoring in the 84th percentile nationally. It is followed by flood risk at the 64th percentile. Additional hazards include tornado (62th), hurricane (49th), wildfire (45th).

Preparedness Context

With earthquake risk as the top concern, Greene 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

Greene County has a disaster risk profile close to the average county in Tennessee. Its composite risk score is within 3.8 points of the state average, meaning its overall hazard exposure is broadly representative of Tennessee as a whole.

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Frequently Asked Questions

What is the natural disaster risk in Greene County, TN?
Greene County has a FEMA National Risk Index rating of Relatively Low, placing it in the 56th 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 Greene County?
Greene County is evaluated for five major natural hazard types: earthquake (84th percentile), flooding (64th percentile), tornado (62th percentile), hurricane (49th percentile), wildfire (45th percentile). The highest-risk hazard is earthquake 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 Greene County risk compare to the Tennessee average?
Greene County's composite risk percentile is 56th, compared to the Tennessee state average of 53th percentile. The state's overall risk rating is Relatively Low. This means Greene County faces higher natural disaster risk than the typical county in Tennessee.
Is Greene County at risk for earthquake?
Yes, Greene County's earthquake risk is at the 84th percentile nationally. This places it in the top quartile for this hazard type. For flooding specifically, Greene County is at the 64th 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 Greene County higher risk than average?
Greene County's composite risk score of 56th percentile is above the Tennessee state average of 53th percentile. This elevated risk is driven by earthquake exposure (84th 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

Hawkins County

Tennessee

-0.5

Relatively Low

56th percentile

Franklin County

Tennessee

+1.2

Relatively Low

58th percentile

Campbell County

Tennessee

+1.7

Relatively Low

58th 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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