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DeKalb County, Georgia

Natural disaster risk, federal disaster history and flood insurance facts.

Relatively Moderate overall risk
5th of 159highest risk in Georgia
$153Mexpected losses a year
16federal declarations
1 in 91homes with flood insurance
Photo: Hermann Luyken, CC0

DeKalb County, Georgia has a moderate overall risk from natural hazards in FEMA's National Risk Index. Its risk score is higher than 94% of US counties. It ranks 5th of 159 counties in Georgia. The costliest hazards here are inland flooding, tornadoes and earthquakes. FEMA estimates about $153 million a year in expected losses, or roughly $201 per resident. Since 1973 it has been included in 16 federal disaster or emergency declarations for natural events (8 major disasters). The most recent was in October 2026 (Hurricane Isaias). About 1 in 91 homes here carry federal flood insurance (2,331 policies). Since 1978, federal flood insurance has paid about $29 million on 1,998 claims here, including $12 million for floods in 2009.

FEMA National Risk Index December 2025; OpenFEMA declarations to Nov 6, 2026; NFIP records. Updated November 6, 2026.

Top risks in DeKalb County

$96.6 million a yearExpected losses. Damaging events about 2 times a year.
  • Check the FEMA flood map for your address, and ask the seller or landlord about past flooding.
  • Price a flood policy now. Most new federal policies take 30 days to start.
$14.8 million a yearExpected losses. Damaging events about once every 6 years.
  • Pick a shelter spot: a basement, or an inside room on the lowest floor with no windows.
  • Turn on emergency alerts on your phone and keep a weather radio.

Earthquake

Moderate
$13.2 million a yearExpected losses. Damaging events about once every 490 years.
  • Ask whether an older house is bolted to its foundation.
  • Consider separate earthquake insurance where risk is high.
HazardRatingScoreExpected loss a year
Inland floodingHigh96.2
$97M
TornadoHigh96.1
$15M
EarthquakeModerate94.8
$13M
Cold waveHigh93.0
$9M
HailHigh98.1
$6M
Heat waveModerate92.5
$4M
LightningVery High98.6
$4M
Strong windHigh95.3
$3M
Ice stormVery High95.3
$2M
HurricaneLow72.6
$756K
Winter weatherModerate65.4
$109K
WildfireVery Low43.7
$32K
LandslideLow77.8
$13K

Scores are percentiles: a score of 90 means higher risk than about 90% of US counties for that hazard. Hazards FEMA does not rate here are left out. Social vulnerability is relatively low and community resilience is relatively low in FEMA's measures.

Federal disaster history

Recent disasters nationwide ›

Declarations by decade

Federal declarations for natural events that included DeKalb County. 2020s bar runs to November 2026.

By type

Hurricane5
Severe Storm4
Tropical Storm2
Tornado1
Drought1
Snowstorm1

Most recent

Oct 9, 2026Hurricane IsaiasEmergency
Jan 24, 2026Severe Winter StormEmergency
Sep 26, 2024Hurricane HeleneEmergency
Sep 15, 2017Hurricane IrmaMajor disaster
Sep 8, 2017Hurricane IrmaEmergency
Feb 11, 2014Severe Winter StormEmergency
Sep 24, 2009Severe Storms and FloodingMajor disaster
Mar 20, 2008Severe Storms and TornadoesMajor disaster
Sep 5, 2005Hurricane Katrina EvacuationEmergency
Sep 18, 2004Hurricane IvanMajor disaster
Show all 16
Jan 28, 2000Severe Winter StormMajor disaster
Mar 11, 1998Severe Storms and FloodingMajor disaster
Oct 10, 1995Hurricane OpalMajor disaster
Mar 15, 1993Severe Snowfall, Winter StormEmergency
Jul 20, 1977DroughtEmergency
Apr 4, 1973Tornadoes & FloodingMajor disaster

Georgia also had 8 statewide declarations that did not name single counties.

Storm history since 1950

Tornado risk by county ›

The National Weather Service has logged 521 storm reports in DeKalb County since 1950, with 2 deaths and 15 injuries and about $68.6 million in reported damage. The strongest on record here was an F3 tornado on January 10, 1972.

16tornadoes
127hail reports, largest 2.5 inches
292damaging thunderstorm winds
64floods and flash floods

Strongest tornadoes

DateStrengthNearHurt / killed
Jan 10, 1972F3–0 / 0
Apr 8, 1998F2Dunwoody0 / 1
May 8, 1978F2–0 / 0
Jun 30, 1966F1–1 / 0
Aug 12, 1969F1–0 / 0

Most damaging storms

DateTypeNearDamage
Apr 8, 1998TornadoDunwoody$25M
Sep 21, 2009FloodDunwoody$6M
Sep 16, 2004Flash FloodCountywide$5M
Feb 21, 2005HailDruid Hills$5M
Jun 12, 2007HailStone Mtn$5M
Apr 24, 2021HailDeerwood Park$4M

Source: NOAA Storm Events Database, county-based reports through Mar 16, 2026. Tornado records start in 1950, hail and wind in 1955, and floods and other storm types in 1996, so older decades undercount. Damage is in dollars of the year it happened and is often an estimate. Winter storms, heat and hurricanes are logged by forecast zone, not county, so they are not counted here.

Hurricanes and tropical storms

Hurricane risk by county ›

Since 1852, 0 hurricanes and 13 tropical storms have passed within 65 miles of the center of DeKalb County, 3 of them since 1950. The strongest was Tropical Storm Eloise (1975), with top winds near 60 mph about 64 miles away.

0hurricanes
0major hurricanes (Category 3+)
13tropical storms
2024most recent: Helene

Strongest storms nearby

DateStormStrengthClosest
Sep 23, 1975EloiseTropical storm, 60 mph64 mi
Sep 27, 2024HeleneTropical storm, 60 mph62 mi
Oct 29, 2020ZetaTropical storm, 60 mph62 mi
Oct 3, 1893UnnamedTropical storm, 55 mph57 mi
Sep 24, 1889UnnamedTropical storm, 50 mph64 mi
Oct 3, 1898UnnamedTropical storm, 50 mph58 mi

Most recent storms

DateStormStrengthClosest
Sep 27, 2024HeleneTropical storm, 60 mph62 mi
Oct 29, 2020ZetaTropical storm, 60 mph62 mi
Sep 23, 1975EloiseTropical storm, 60 mph64 mi
Sep 4, 1915UnnamedTropical storm, 45 mph61 mi
Sep 15, 1903UnnamedTropical storm, 40 mph61 mi
Oct 3, 1898UnnamedTropical storm, 50 mph58 mi

Source: NOAA National Hurricane Center best-track records (HURDAT2), 1851 to 2025 for the Atlantic and 1949 to 2025 for the eastern Pacific. A storm counts if its track passed within 65 miles of the county's center while it was a tropical storm or hurricane. Strength is the storm's top sustained wind at that point, not the wind measured in the county. Older storms over the open sea were sometimes missed.

Flood insurance in DeKalb County

Check your address flood zone ›
1.1%of homes have federal flood insurance (2,331 policies)
72.4%of homes in mapped high-risk flood zones are insured
$29.2 millionpaid on 1,998 flood claims since 1978
2009costliest year, with $12.1 million paid

National Flood Insurance Program (NFIP) records only; private flood policies are not included. Home counts as of Aug 3, 2026. Since 2021 NFIP prices each home separately under Risk Rating 2.0, so your price depends on the building, not the county. Ask an agent for a quote.

Homes in DeKalb County

$357,800median home value (Georgia $303,300, US $332,700)
1984median year homes were built (Georgia 1992, US 1980)
44%of homes built before 1980, before many modern wind, quake and flood building rules
0.6%of homes are mobile homes, which are the least safe in tornadoes and high winds

Older homes and mobile homes usually suffer more damage in storms, floods and earthquakes, and can cost more to insure. If you are buying, ask about roof age, foundation bolting and any retrofits. Source: US Census Bureau, American Community Survey 2020 to 2024 5-year estimates; 330,830 housing units.

Compare in Georgia

All 159 ›
Largest countiesOverall riskTop hazard
Fulton CountyHighInland flooding
Gwinnett CountyHighInland flooding
Cobb CountyHighInland flooding
DeKalb CountyModerateInland flooding
Clayton CountyModerateInland flooding
Chatham CountyHighHurricane
Cherokee CountyModerateInland flooding
Forsyth CountyModerateInland flooding

Neighboring counties

CountyOverall riskDeclarations
Fulton CountyHigh20
Gwinnett CountyHigh13
Clayton CountyModerate14
Henry CountyLow15
Rockdale CountyLow15

Common questions about DeKalb County

What is the biggest natural hazard in DeKalb County?

Inland flooding has the highest expected yearly losses in DeKalb County, about $96.6 million a year in FEMA's estimate. Tornado is second at $14.8 million.

How many federal disasters has DeKalb County had?

DeKalb County has been included in 16 federal disaster or emergency declarations for natural events since 1973, including 8 major disasters. The most recent was Hurricane Isaias in October 2026.

Is DeKalb County a high-risk place to live?

Its overall rating is Relatively Moderate, 5th highest of 159 in Georgia. A county rating covers the whole area. Risk at one address can be much higher or lower, so check the FEMA flood map and ask about the home's history.

Do I need flood insurance in DeKalb County?

Standard home insurance does not cover flooding. About 1 in 91 homes in DeKalb County has federal flood insurance. Lenders require it in mapped high-risk zones, but many flood claims come from outside those zones.

How many tornadoes has DeKalb County had?

NOAA records list 16 tornadoes in DeKalb County since 1950. The strongest was an F3 tornado on January 10, 1972. The weather service has also logged 127 hail reports and 64 floods here.

How many hurricanes have hit DeKalb County?

NOAA's hurricane records show 0 hurricanes and 13 tropical storms passing within 65 miles of the center of DeKalb County. The strongest was Tropical Storm Eloise (1975), with winds near 60 mph.

Sources: FEMA National Risk Index (December 2025), OpenFEMA Disaster Declarations Summaries, and NFIP policy and claims data. Hazard Compass is independent and not affiliated with FEMA. These figures describe the whole county, not a single property, and are not insurance or safety advice. Report a problem.