DeKalb County Disaster Risk
DeKalb County, Georgia
FEMA Risk Rating
Relatively Moderate
National Percentile
94th
of 3,144 counties
State Rank
#5
of 159 (1 = highest risk)
Flood Risk
96th
percentile
Hazard Risk Breakdown
Flood
River, coastal, and surface flooding risk
Relatively High
Higher than 96% of US counties
Wildfire
Wildland and wildland-urban interface fire risk
Relatively Low
Higher than 44% of US counties
Tornado
Tornado and severe thunderstorm risk
Relatively High
Higher than 96% of US counties
Earthquake
Seismic activity and ground shaking risk
Relatively High
Higher than 95% of US counties
Hurricane
Tropical cyclone and hurricane risk
Relatively Low
Higher than 73% of US counties
Risk Overview
About Natural Disaster Risk in DeKalb County, Georgia
DeKalb faces one of nation's highest risk profiles
DeKalb County scores 94.27 on composite risk, placing it in the Relatively Moderate category and well above the national average. This major Atlanta-area county contends with significant exposure to floods, tornadoes, earthquakes, and other hazards due to its dense development and geographic position.
Georgia's riskiest county by far
DeKalb's 94.27 score towers above Georgia's state average of 39.49, making it the state's highest-risk county. The county's ranking reflects its large population, urban density, and position in Georgia's seismic and tornado zones.
DeKalb's risk far exceeds surrounding counties
DeKalb's 94.27 score dwarfs Dade County (33.21) and Douglas County (65.71), both nearby, showing how dense urban areas concentrate disaster exposure. This risk concentration demands special attention from the county's 750,000+ residents.
Floods and tornadoes threaten every neighborhood
DeKalb's flood risk hits 96.25 and tornado risk reaches 96.06—the county's two dominant hazards and both near the top of any U.S. county ranking. Earthquake risk (94.75) adds significant secondary exposure, while hurricane risk (72.63) remains elevated from coastal systems.
Flood insurance is critical for DeKalb residents
All DeKalb homeowners should carry flood insurance, even those outside official flood zones, given the 96.25 flood risk score; standard homeowners policies exclude flood damage. Combine this with tornado/wind coverage, consider earthquake insurance, and ensure your property has safe room access for severe weather events.
Source: FEMA National Risk Index · Narrative reviewed by Evan Brooks, Data Editor
Preparedness Guide
What to Prepare for in DeKalb County
Top Hazards by Exposure
Source: FEMA National Risk Index v1.19.0 · Percentiles are national (3,144 counties)
Risk Advisory: DeKalb County
Risk Verdict
Natural hazard risk in DeKalb County is higher than the majority of U.S. counties, with a national composite rank of 94th. DeKalb County's elevated composite score reflects cumulative multi-hazard exposure; households should prepare for the county's two or three primary hazard types.
Hazard Breakdown
Flood risk is DeKalb County's dominant natural hazard, ranked at the 96th percentile nationally under FEMA's National Risk Index. Tornado ranks second at the 96th percentile nationally. Additional tracked hazards include earthquake (95th percentile), hurricane (73th percentile), wildfire (44th percentile).
Preparedness Context
With flood ranked as the primary hazard at the 96th percentile nationally, DeKalb County households should build a go-bag that includes important documents, medications, and supplies to sustain the family for at least three days if evacuation is needed. Alongside flooding, tornado exposure at the 96th percentile means households benefit from a multi-hazard preparedness plan rather than focusing on flood alone. A waterproof container for documents (insurance policies, ID, prescriptions) and a clear household communication plan for when phone networks are congested are the two highest-value low-cost preparedness steps for DeKalb County households.
Regional Context
A composite score 54.8 points above the Georgia state average puts DeKalb County in a higher-risk category than most counties in the state.
Is your household prepared for DeKalb County's hazards?
Review FEMA's county-specific preparedness checklists and emergency planning guides.
Frequently Asked Questions
What is the natural disaster risk in DeKalb County, GA?
What types of natural hazards affect DeKalb County?
How does DeKalb County risk compare to the Georgia average?
Is DeKalb County at risk for flooding?
How is natural disaster risk measured?
Why is DeKalb County higher risk than average?
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.