riskbycounty
FEMA National Risk Index

Dillon County Disaster Risk

Dillon County, South Carolina

FEMA Risk Rating

Relatively Moderate

National Percentile

84th

of 3,144 counties

State Rank

#17

of 46 (1 = highest risk)

Flood Risk

62th

percentile

Hazard Risk Breakdown

Flood

River, coastal, and surface flooding risk

Relatively Low

Higher than 62% of US counties

Wildfire

Wildland and wildland-urban interface fire risk

Moderate

Higher than 81% of US counties

Tornado

Tornado and severe thunderstorm risk

Relatively Low

Higher than 80% of US counties

Earthquake

Seismic activity and ground shaking risk

Moderate

Higher than 85% of US counties

Hurricane

Tropical cyclone and hurricane risk

Relatively High

Higher than 96% of US counties

Risk Advisory: Dillon County

Risk Verdict

Dillon County has a relatively moderate overall disaster risk profile, scoring in the 84th 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

Hurricane risk is the dominant hazard for Dillon County, scoring in the 96th percentile nationally. It is followed by earthquake risk at the 85th percentile. Additional hazards include wildfire (81th), tornado (80th), flood (62th).

Preparedness Context

With hurricane risk as the top concern, Dillon County residents should know your evacuation route, stockpile supplies for at least 72 hours, and review your homeowners and flood insurance policies annually. 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

Dillon County is significantly riskier than the average county in South Carolina. Its composite risk score is 13.6 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 Dillon County, SC?
Dillon County has a FEMA National Risk Index rating of Relatively Moderate, placing it in the 84th 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 Dillon County?
Dillon County is evaluated for five major natural hazard types: hurricane (96th percentile), earthquake (85th percentile), wildfire (81th percentile), tornado (80th percentile), flooding (62th percentile). The highest-risk hazard is hurricane at the 96th 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 Dillon County risk compare to the South Carolina average?
Dillon County's composite risk percentile is 84th, compared to the South Carolina state average of 71th percentile. The state's overall risk rating is Relatively Low. This means Dillon County faces higher natural disaster risk than the typical county in South Carolina.
Is Dillon County at risk for hurricane?
Yes, Dillon County's hurricane risk is at the 96th percentile nationally. This places it in the top quartile for this hazard type. For flooding specifically, Dillon County is at the 62th 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 Dillon County higher risk than average?
Dillon County's composite risk score of 84th percentile is above the South Carolina state average of 71th percentile. This elevated risk is driven by hurricane exposure (96th percentile), along with earthquake and wildfire and tornado and flooding 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

Aiken County

South Carolina

-0.1

Relatively Moderate

84th percentile

Colleton County

South Carolina

+1.1

Relatively Moderate

85th percentile

Oconee County

South Carolina

+1.3

Relatively Moderate

86th 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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