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Unicoi County, Tennessee

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

Very Low overall risk
91st of 95highest risk in Tennessee
$4Mexpected losses a year
16federal declarations
1 in 59homes with flood insurance
Photo: U.S. Geological Survey, public domain

Unicoi County, Tennessee has a very low overall risk from natural hazards in FEMA's National Risk Index. Its risk score is lower than 89% of US counties. It ranks 91st of 95 counties in Tennessee. The costliest hazards here are inland flooding, cold waves and strong wind. FEMA estimates about $4.4 million a year in expected losses, or roughly $243 per resident. Since 1973 it has been included in 16 federal disaster or emergency declarations for natural events (11 major disasters). The most recent was in February 2026 (severe winter storm). About 1 in 59 homes here carry federal flood insurance (136 policies). Since 1978, federal flood insurance has paid about $1.3 million on 64 claims here, including $1.0 million for floods in 2024.

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

Top risks in Unicoi County

$2.8 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.
$666,269 a yearExpected losses. Damaging events about 3 times a year.
  • Insulate pipes in outside walls, crawl spaces and garages.
  • Know how to shut off the main water valve.
$268,006 a yearExpected losses. Damaging events about 3 times a year.
  • Secure outdoor furniture and trash bins before storms.
  • Have trees near the house checked.
HazardRatingScoreExpected loss a year
Inland floodingVery Low27.4
$3M
Cold waveLow43.9
$666K
Strong windLow31.4
$268K
LightningLow47.0
$183K
EarthquakeVery Low43.8
$169K
TornadoVery Low17.5
$165K
Ice stormLow28.6
$26K
LandslideLow83.1
$21K
HailVery Low7.5
$19K
HurricaneVery Low34.2
$17K
WildfireVery Low32.5
$15K
Winter weatherVery Low19.0
$14K
Heat waveVery Low1.8
$0

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 Unicoi County. 2020s bar runs to November 2026.

By type

Flood5
Severe Storm5
Tropical Storm2
Winter Storm2
Snowstorm1
Hurricane1

Most recent

Feb 6, 2026Severe Winter StormMajor disaster
Jan 24, 2026Severe Winter StormEmergency
Apr 2, 2025Severe Storms, Straight-Line Winds, Tornadoes, and FloodingEmergency
Oct 2, 2024Tropical Storm HeleneMajor disaster
Sep 27, 2024Tropical Storm HeleneEmergency
Apr 24, 2020Severe Storms, Tornadoes, Straight-Line Winds, and FloodingMajor disaster
Apr 17, 2019Severe Storms, Flooding, Landslides, and MudslidesMajor disaster
Sep 5, 2005Hurricane Katrina EvacuationEmergency
Oct 7, 2004Severe Storms and FloodingMajor disaster
Aug 15, 2001Severe Storms and FloodingMajor disaster
Show all 16
Jan 13, 1998Severe Storms and FloodingMajor disaster
Apr 14, 1994Extensive Rainfall and Flash FloodingMajor disaster
Mar 14, 1993Severe Snowfall, Winter StormEmergency
May 25, 1984Severe Storms & FloodingMajor disaster
Nov 12, 1977Severe Storms & FloodingMajor disaster
Mar 21, 1973Heavy Rains & FloodingMajor disaster

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

Storm history since 1967

Tornado risk by county ›

The National Weather Service has logged 111 storm reports in Unicoi County since 1967, with 10 deaths and 13 injuries and about $11.1 million in reported damage. The strongest on record here was an F3 tornado on July 10, 1980.

2tornadoes
20hail reports, largest 2.75 inches
71damaging thunderstorm winds
17floods and flash floods

Strongest tornadoes

DateStrengthNearHurt / killed
Jul 10, 1980F3–12 / 0
Apr 9, 2011EF0Rocky Fork0 / 0

Most damaging storms

DateTypeNearDamage
Sep 27, 2024Flash FloodErwin$10M
Feb 6, 2020FloodUnicoi$350K
Jul 10, 1980Tornado–$250K
Aug 17, 2010FloodErwin$70K
Aug 5, 2012Flash FloodUnicoi$50K
May 21, 2013Flash FloodErwin$40K

Source: NOAA Storm Events Database, county-based reports through Jul 28, 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 1959, 0 hurricanes and 3 tropical storms have passed within 65 miles of the center of Unicoi County, 3 of them since 1950. The strongest was Tropical Storm Hugo (1989), with top winds near 65 mph about 42 miles away.

0hurricanes
0major hurricanes (Category 3+)
3tropical storms
2020most recent: Zeta

Strongest storms nearby

DateStormStrengthClosest
Sep 22, 1989HugoTropical storm, 65 mph42 mi
Oct 29, 2020ZetaTropical storm, 50 mph31 mi
Sep 30, 1959GracieTropical storm, 45 mph62 mi

Most recent storms

DateStormStrengthClosest
Oct 29, 2020ZetaTropical storm, 50 mph31 mi
Sep 22, 1989HugoTropical storm, 65 mph42 mi
Sep 30, 1959GracieTropical storm, 45 mph62 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 Unicoi County

Check your address flood zone ›
1.7%of homes have federal flood insurance (136 policies)
28.7%of homes in mapped high-risk flood zones are insured
$1.3 millionpaid on 64 flood claims since 1978
2024costliest year, with $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 Unicoi County

$189,600median home value (Tennessee $286,700, US $332,700)
1977median year homes were built (Tennessee 1987, US 1980)
57%of homes built before 1980, before many modern wind, quake and flood building rules
19.5%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; 8,749 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
Washington CountyLow14
Greene CountyLow16
Carter CountyLow16
Madison County, NCVery Low21
Yancey County, NCVery Low21
Mitchell County, NCVery Low19

Common questions about Unicoi County

What is the biggest natural hazard in Unicoi County?

Inland flooding has the highest expected yearly losses in Unicoi County, about $2.8 million a year in FEMA's estimate. Cold wave is second at $666,269.

How many federal disasters has Unicoi County had?

Unicoi County has been included in 16 federal disaster or emergency declarations for natural events since 1973, including 11 major disasters. The most recent was Severe Winter Storm in February 2026.

Is Unicoi County a high-risk place to live?

Its overall rating is Very Low, 91st 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 Unicoi County?

Standard home insurance does not cover flooding. About 1 in 59 homes in Unicoi 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 Unicoi County had?

NOAA records list 2 tornadoes in Unicoi County since 1950. The strongest was an F3 tornado on July 10, 1980. The weather service has also logged 20 hail reports and 17 floods here.

How many hurricanes have hit Unicoi County?

NOAA's hurricane records show 0 hurricanes and 3 tropical storms passing within 65 miles of the center of Unicoi County. The strongest was Tropical Storm Hugo (1989), with winds near 65 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.