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DeKalb County, Tennessee

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

Very Low overall risk
77th of 95highest risk in Tennessee
$8Mexpected losses a year
18federal declarations
1 in 333homes with flood insurance
Photo: U.S. Geological Survey, public domain

DeKalb County, Tennessee has a very low overall risk from natural hazards in FEMA's National Risk Index. Its risk score is lower than 74% of US counties. It ranks 77th of 95 counties in Tennessee. The costliest hazards here are inland flooding, tornadoes and cold waves. FEMA estimates about $7.5 million a year in expected losses, or roughly $376 per resident. Since 1974 it has been included in 18 federal disaster or emergency declarations for natural events (14 major disasters). The most recent was in February 2026 (severe winter storm). Only 33 homes here carry federal flood insurance. Since 1978, federal flood insurance has paid about $161,000 on 17 claims here.

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

Top risks in DeKalb County

$3.6 million a yearExpected losses. Damaging events about once every 1 years.
  • 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.
$1.1 million a yearExpected losses. Damaging events about once every 4 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.
$899,349 a yearExpected losses. Damaging events about once a year.
  • Insulate pipes in outside walls, crawl spaces and garages.
  • Know how to shut off the main water valve.
HazardRatingScoreExpected loss a year
Inland floodingVery Low34.5
$4M
TornadoLow48.9
$1M
Cold waveLow51.7
$899K
EarthquakeLow69.0
$658K
Strong windModerate56.1
$575K
HailLow48.7
$219K
LightningLow43.6
$164K
DroughtLow52.5
$152K
Heat waveVery Low24.4
$81K
Winter weatherLow58.7
$77K
HurricaneVery Low47.7
$53K
Ice stormLow30.6
$29K
WildfireVery Low7.7
$2K
LandslideVery Low57.2
$2K

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 moderate 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

Severe Storm8
Tornado2
Flood2
Severe Ice Storm2
Winter Storm2
Snowstorm1

Most recent

Feb 6, 2026Severe Winter StormMajor disaster
Jan 24, 2026Severe Winter StormEmergency
Apr 2, 2025Severe Storms, Straight-Line Winds, Tornadoes, and FloodingEmergency
Apr 21, 2021Severe Winter StormsMajor disaster
Apr 17, 2019Severe Storms, Flooding, Landslides, and MudslidesMajor disaster
Apr 2, 2015Severe Winter Storm and FloodingMajor disaster
Mar 16, 2012Severe Storms, Tornadoes, Straight-Line Winds AndMajor disaster
May 4, 2010Severe Storms, Flooding, Straight-Line Winds, and TornadoesMajor disaster
Sep 5, 2005Hurricane Katrina EvacuationEmergency
May 8, 2003Severe Storms, Tornadoes, and FloodingMajor disaster
Show all 18
Apr 5, 2002Severe Storms and FloodingMajor disaster
Jan 15, 1999Severe Winter StormMajor disaster
Jan 13, 1998Severe Storms and FloodingMajor disaster
Mar 7, 1997Heavy Rains, Tornadoes, Flooding, Hail, High WindsMajor disaster
Feb 28, 1994Severe Winter Ice Storm,Flash FloodingMajor disaster
Mar 14, 1993Severe Snowfall, Winter StormEmergency
Mar 22, 1975Severe Storms & FloodingMajor disaster
Apr 4, 1974TornadoesMajor disaster

Tennessee also had 1 statewide declarations that did not name single counties.

Storm history since 1968

Tornado risk by county ›

The National Weather Service has logged 210 storm reports in DeKalb County since 1968, with 1 death and 22 injuries and about $6.6 million in reported damage. The strongest on record here was an F3 tornado on April 27, 1971.

15tornadoes
39hail reports, largest 1.75 inches
130damaging thunderstorm winds
20floods and flash floods

Strongest tornadoes

DateStrengthNearHurt / killed
Apr 27, 1971F3–0 / 0
Apr 3, 1974F3–20 / 0
Jan 24, 1997F2Smithville0 / 0
Jan 24, 1997F2Alexandria1 / 0
Feb 29, 2012EF1Smithville0 / 1

Most damaging storms

DateTypeNearDamage
May 18, 1995HailSmithville$2M
Jun 9, 1998HailSmithville$750K
Feb 29, 2012TornadoSmithville$500K
May 18, 1995Thunderstorm WindSmithville$500K
May 5, 2003Thunderstorm WindCountywide$300K
May 6, 2024TornadoSmithville$300K

Source: NOAA Storm Events Database, county-based reports through Jul 3, 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 1892, 0 hurricanes and 3 tropical storms have passed within 65 miles of the center of DeKalb County, 2 of them since 1950. The strongest was Tropical Storm Frederic (1979), with top winds near 45 mph about 54 miles away.

0hurricanes
0major hurricanes (Category 3+)
3tropical storms
1979most recent: Frederic

Strongest storms nearby

DateStormStrengthClosest
Sep 14, 1979FredericTropical storm, 45 mph54 mi
Sep 13, 1892UnnamedTropical storm, 45 mph44 mi
Jun 28, 1957AudreyTropical storm, 40 mph44 mi

Most recent storms

DateStormStrengthClosest
Sep 14, 1979FredericTropical storm, 45 mph54 mi
Jun 28, 1957AudreyTropical storm, 40 mph44 mi
Sep 13, 1892UnnamedTropical storm, 45 mph44 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 ›
0.3%of homes have federal flood insurance (33 policies)
13%of homes in mapped high-risk flood zones are insured
$161,148paid on 17 flood claims since 1978
2021costliest year, with $58,950 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

$235,500median home value (Tennessee $286,700, US $332,700)
1986median year homes were built (Tennessee 1987, US 1980)
42%of homes built before 1980, before many modern wind, quake and flood building rules
11.7%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; 10,155 housing units.

Compare in Tennessee

All 95 ›
Largest countiesOverall riskTop hazard
Shelby CountyHighEarthquake
Davidson CountyHighInland flooding
Knox CountyModerateInland flooding
Hamilton CountyModerateInland flooding
Rutherford CountyModerateInland flooding
Williamson CountyModerateInland flooding
Montgomery CountyModerateInland flooding
Sumner CountyModerateInland flooding

Neighboring counties

CountyOverall riskDeclarations
Wilson CountyLow15
Putnam CountyLow17
Warren CountyLow20
White CountyVery Low16
Smith CountyVery Low20
Cannon CountyVery Low20

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 $3.6 million a year in FEMA's estimate. Tornado is second at $1.1 million.

How many federal disasters has DeKalb County had?

DeKalb County has been included in 18 federal disaster or emergency declarations for natural events since 1974, including 14 major disasters. The most recent was Severe Winter Storm in February 2026.

Is DeKalb County a high-risk place to live?

Its overall rating is Very Low, 77th highest of 95 in Tennessee. 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 333 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 15 tornadoes in DeKalb County since 1950. The strongest was an F3 tornado on April 27, 1971. The weather service has also logged 39 hail reports and 20 floods here.

How many hurricanes have hit DeKalb County?

NOAA's hurricane records show 0 hurricanes and 3 tropical storms passing within 65 miles of the center of DeKalb County. The strongest was Tropical Storm Frederic (1979), with winds near 45 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.