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Harmon County, Oklahoma

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

Very Low overall risk
76th of 77highest risk in Oklahoma
$3Mexpected losses a year
18federal declarations
1 in 333homes with flood insurance
Photo: Aleatoric Consonance, CC BY 2.0

Harmon County, Oklahoma has a very low overall risk from natural hazards in FEMA's National Risk Index. Its risk score is lower than 90% of US counties. It ranks 76th of 77 counties in Oklahoma. The costliest hazards here are drought, strong wind and tornadoes. FEMA estimates about $3.3 million a year in expected losses, or roughly $1,328 per resident. Since 1995 it has been included in 18 federal disaster or emergency declarations for natural events (12 major disasters). The most recent was in February 2021 (severe winter storms). Only 5 homes here carry federal flood insurance. Since 1978, federal flood insurance has paid about $195,000 on 27 claims here.

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

Top risks in Harmon County

$1.3 million a yearExpected losses. Damaging events about 140 times a year.
  • Check local water restrictions.
  • Choose drought-tolerant plants.

Strong wind

Moderate
$472,795 a yearExpected losses. Damaging events about 4 times a year.
  • Secure outdoor furniture and trash bins before storms.
  • Have trees near the house checked.
$426,361 a yearExpected losses. Damaging events about once every 2 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.
HazardRatingScoreExpected loss a year
DroughtHigh92.0
$1M
Strong windModerate58.7
$473K
TornadoLow33.7
$426K
Inland floodingVery Low3.8
$399K
HailLow61.8
$272K
Cold waveVery Low21.0
$164K
Ice stormLow57.3
$80K
Heat waveVery Low25.7
$70K
WildfireVery Low58.0
$50K
EarthquakeVery Low20.9
$21K
Winter weatherLow26.1
$17K
LightningVery Low5.5
$12K
HurricaneVery Low17.0
$3K
LandslideVery Low21.5
$91

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 very high and community resilience is very low in FEMA's measures.

Federal disaster history

Recent disasters nationwide ›

Declarations by decade

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

By type

Severe Storm7
Severe Ice Storm7
Fire2
Tornado1
Hurricane1

Most recent

Feb 24, 2021Severe Winter StormsMajor disaster
Feb 17, 2021Severe Winter StormEmergency
Jun 25, 2018WildfiresMajor disaster
Feb 10, 2016Severe Winter Storms and FloodingMajor disaster
May 26, 2015Severe Storms, Tornadoes, Straight-Line Winds, and FloodingMajor disaster
Feb 2, 2011Severe Winter StormEmergency
Mar 5, 2010Severe Winter StormMajor disaster
Feb 25, 2010Severe Winter StormMajor disaster
Jan 30, 2010Severe Winter StormEmergency
Jul 9, 2008Severe Storms and FloodingMajor disaster
Show all 18
Dec 10, 2007Severe Winter StormsEmergency
Jan 14, 2007Severe Winter Storms and FloodingEmergency
Jan 10, 2006Extreme Wildfire ThreatMajor disaster
Sep 5, 2005Hurricane Katrina EvacuationEmergency
Feb 1, 2002Severe Winter Ice StormMajor disaster
Jan 5, 2001Severe Winter Ice StormMajor disaster
Sep 1, 1995Severe Storms and FloodingMajor disaster
Jun 26, 1995Tornadoes, Severe Storms and FloodingMajor disaster

Oklahoma also had 43 statewide declarations that did not name single counties.

Storm history since 1952

Tornado risk by county ›

The National Weather Service has logged 501 storm reports in Harmon County since 1952, with 0 deaths and 6 injuries and about $3.3 million in reported damage. The strongest on record here was an F2 tornado on May 6, 1965.

38tornadoes
286hail reports, largest 4.25 inches
171damaging thunderstorm winds
4floods and flash floods

Strongest tornadoes

DateStrengthNearHurt / killed
May 6, 1965F2–2 / 0
May 6, 1968F2–0 / 0
May 13, 1983F2–0 / 0
May 13, 1983F2–0 / 0
May 13, 1983F2–0 / 0

Most damaging storms

DateTypeNearDamage
Oct 8, 1999HailGould$640K
Dec 12, 1993Thunderstorm WindHollis$500K
Apr 28, 2006HailVinson$350K
May 6, 1965Tornado–$250K
May 6, 1968Tornado–$250K
May 13, 1983Tornado–$250K

Source: NOAA Storm Events Database, county-based reports through Jun 23, 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.

Flood insurance in Harmon County

Check your address flood zone ›
0.3%of homes have federal flood insurance (5 policies)
3.3%of homes in mapped high-risk flood zones are insured
$195,378paid on 27 flood claims since 1978
2016costliest year, with $80,347 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 Harmon County

$79,700median home value (Oklahoma $199,800, US $332,700)
1964median year homes were built (Oklahoma 1980, US 1980)
78%of homes built before 1980, before many modern wind, quake and flood building rules
5.5%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; 1,354 housing units.

Compare in Oklahoma

All 77 ›
Largest countiesOverall riskTop hazard
Oklahoma CountyHighInland flooding
Tulsa CountyHighInland flooding
Cleveland CountyModerateInland flooding
Canadian CountyModerateInland flooding
Comanche CountyModerateInland flooding
Rogers CountyLowInland flooding
Payne CountyModerateCold wave
Wagoner CountyLowInland flooding

Neighboring counties

CountyOverall riskDeclarations
Jackson CountyModerate28
Beckham CountyLow26
Childress County, TXVery Low12
Greer CountyVery Low20
Hardeman County, TXVery Low14
Collingsworth County, TXVery Low12

Common questions about Harmon County

What is the biggest natural hazard in Harmon County?

Drought has the highest expected yearly losses in Harmon County, about $1.3 million a year in FEMA's estimate. Strong wind is second at $472,795.

How many federal disasters has Harmon County had?

Harmon County has been included in 18 federal disaster or emergency declarations for natural events since 1995, including 12 major disasters. The most recent was Severe Winter Storms in February 2021.

Is Harmon County a high-risk place to live?

Its overall rating is Very Low, 76th highest of 77 in Oklahoma. 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 Harmon County?

Standard home insurance does not cover flooding. About 1 in 333 homes in Harmon 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 Harmon County had?

NOAA records list 38 tornadoes in Harmon County since 1950. The strongest was an F2 tornado on May 6, 1965. The weather service has also logged 286 hail reports and 4 floods here.

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.