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Columbia County, Wisconsin

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

Relatively Moderate overall risk
10th of 72highest risk in Wisconsin
$51Mexpected losses a year
9federal declarations
1 in 167homes with flood insurance
Photo: James St. John, CC BY 2.0

Columbia County, Wisconsin has a moderate overall risk from natural hazards in FEMA's National Risk Index. Its risk score is higher than 81% of US counties. It ranks 10th of 72 counties in Wisconsin. The costliest hazards here are hail, inland flooding and cold waves. FEMA estimates about $51 million a year in expected losses, or roughly $880 per resident. Since 1976 it has been included in 9 federal disaster or emergency declarations for natural events (6 major disasters). The most recent was in June 2008 (severe storms, tornadoes and flooding). Fewer than 1 in 100 homes here carry federal flood insurance (138 policies). Since 1978, federal flood insurance has paid about $2.5 million on 179 claims here.

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

Top risks in Columbia County

Hail

Very High
$20.5 million a yearExpected losses. Damaging events about 4 times a year.
  • Ask about the roof age and any impact-rated shingles.
  • Check your home policy for a separate wind and hail deductible.
$18.8 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.

Cold wave

Moderate
$5 million a yearExpected losses. Damaging events about 6 times a year.
  • Insulate pipes in outside walls, crawl spaces and garages.
  • Know how to shut off the main water valve.
HazardRatingScoreExpected loss a year
HailVery High99.3
$21M
Inland floodingModerate75.6
$19M
Cold waveModerate82.8
$5M
TornadoModerate75.7
$4M
Heat waveModerate80.4
$2M
Strong windModerate71.9
$1M
LightningLow37.2
$165K
Winter weatherLow51.7
$77K
EarthquakeVery Low28.7
$74K
DroughtLow38.8
$67K
Ice stormLow35.9
$50K
WildfireVery Low42.3
$34K
LandslideLow72.9
$9K
HurricaneVery Low10.6
$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 low and community resilience is very high in FEMA's measures.

Federal disaster history

Recent disasters nationwide ›

Declarations by decade

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

By type

Severe Storm5
Flood1
Drought1
Snowstorm1
Hurricane1

Most recent

Jun 14, 2008Severe Storms, Tornadoes, and FloodingMajor disaster
Aug 26, 2007Severe Storms and FloodingMajor disaster
Sep 13, 2005Hurricane Katrina EvacuationEmergency
Jun 18, 2004Severe Storms and FloodingMajor disaster
Jan 24, 2001SnowEmergency
Jun 24, 2000Severe Storms, Tornadoes, and FloodingMajor disaster
Jul 2, 1993Severe Storms, Tornadoes & FloodingMajor disaster
Jun 17, 1976DroughtEmergency
Mar 23, 1976Severe Storms, Icing, Wind & FloodingMajor disaster

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

Storm history since 1951

Tornado risk by county ›

The National Weather Service has logged 502 storm reports in Columbia County since 1951, with 1 death and 59 injuries and about $594 million in reported damage. The strongest on record here was an F5 tornado on June 7, 1984.

39tornadoes
139hail reports, largest 3 inches
242damaging thunderstorm winds
67floods and flash floods

Strongest tornadoes

DateStrengthNearHurt / killed
Jun 7, 1984F5–0 / 0
Sep 26, 1951F4–9 / 1
Jun 8, 1984F3–1 / 0
Aug 16, 1963F3–13 / 0
Aug 16, 1963F3–13 / 0

Most damaging storms

DateTypeNearDamage
Jun 25, 2006HailDekorra$502M
Jun 8, 2008Flash FloodOkee$56M
Aug 3, 2004HailRio$7M
May 31, 1998Thunderstorm WindCountywide$4M
Aug 3, 2004Thunderstorm WindRio$3M
Jun 7, 2008TornadoPardeeville$3M

Source: NOAA Storm Events Database, county-based reports through Jul 8, 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 Columbia County

Check your address flood zone ›
0.6%of homes have federal flood insurance (138 policies)
23.2%of homes in mapped high-risk flood zones are insured
$2.5 millionpaid on 179 flood claims since 1978
2019costliest year, with $585,690 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 Columbia County

$283,200median home value (Wisconsin $266,500, US $332,700)
1976median year homes were built (Wisconsin 1975, US 1980)
55%of homes built before 1980, before many modern wind, quake and flood building rules
2.7%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; 26,880 housing units.

Compare in Wisconsin

All 72 ›
Largest countiesOverall riskTop hazard
Milwaukee CountyHighCold wave
Dane CountyModerateInland flooding
Waukesha CountyModerateInland flooding
Brown CountyModerateInland flooding
Racine CountyModerateInland flooding
Outagamie CountyLowInland flooding
Winnebago CountyModerateInland flooding
Kenosha CountyModerateCold wave

Neighboring counties

CountyOverall riskDeclarations
Dane CountyModerate17
Dodge CountyLow11
Sauk CountyLow13
Juneau CountyLow14
Adams CountyLow10
Green Lake CountyLow7
Marquette CountyLow7

Common questions about Columbia County

What is the biggest natural hazard in Columbia County?

Hail has the highest expected yearly losses in Columbia County, about $20.5 million a year in FEMA's estimate. Inland flooding is second at $18.8 million.

How many federal disasters has Columbia County had?

Columbia County has been included in 9 federal disaster or emergency declarations for natural events since 1976, including 6 major disasters. The most recent was Severe Storms, Tornadoes, and Flooding in June 2008.

Is Columbia County a high-risk place to live?

Its overall rating is Relatively Moderate, 10th highest of 72 in Wisconsin. 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 Columbia County?

Standard home insurance does not cover flooding. About 1 in 167 homes in Columbia 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 Columbia County had?

NOAA records list 39 tornadoes in Columbia County since 1950. The strongest was an F5 tornado on June 7, 1984. The weather service has also logged 139 hail reports and 67 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.