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Polk County, Minnesota

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

Relatively Low overall risk
20th of 87highest risk in Minnesota
$27Mexpected losses a year
29federal declarations
1 in 200homes with flood insurance
Photo: U.S. Geological Survey, public domain

Polk County, Minnesota has a relatively low overall risk from natural hazards in FEMA's National Risk Index. Its risk score is higher than 67% of US counties. It ranks 20th of 87 counties in Minnesota. The costliest hazards here are inland flooding, cold waves and drought. FEMA estimates about $27 million a year in expected losses, or roughly $864 per resident. Since 1965 it has been included in 29 federal disaster or emergency declarations for natural events (25 major disasters). The most recent was in July 2022 (severe storms, straight-line winds and flooding). Fewer than 1 in 100 homes here carry federal flood insurance (102 policies). Since 1978, federal flood insurance has paid about $36 million on 1,455 claims here, including $34 million for floods in 1997.

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

Top risks in Polk County

$13.4 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.
$7.5 million a yearExpected losses. Damaging events about 21 times a year.
  • Insulate pipes in outside walls, crawl spaces and garages.
  • Know how to shut off the main water valve.

Drought

Moderate
$1.6 million a yearExpected losses. Damaging events about 8 times a year.
  • Check local water restrictions.
  • Choose drought-tolerant plants.
HazardRatingScoreExpected loss a year
Inland floodingLow69.8
$13M
Cold waveHigh90.2
$7M
DroughtModerate89.2
$2M
TornadoLow47.5
$1M
HailModerate81.6
$1M
Strong windModerate65.4
$870K
WildfireLow83.4
$608K
Winter weatherHigh92.1
$481K
Ice stormLow54.5
$107K
Heat waveVery Low24.9
$99K
LightningVery Low15.5
$55K
EarthquakeVery Low5.9
$6K
LandslideVery Low54.2
$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 low and community resilience is relatively high in FEMA's measures.

Federal disaster history

Recent disasters nationwide ›

Declarations by decade

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

By type

Flood17
Severe Storm8
Drought1
Severe Ice Storm1
Hurricane1
Tornado1

Most recent

Jul 13, 2022Severe Storms, Straight-Line Winds, and FloodingMajor disaster
Jun 12, 2019Severe Winter Storm, Straight-Line Winds, and FloodingMajor disaster
Sep 5, 2018Severe Storms, Tornadoes, Straight-Line Winds, and FloodingMajor disaster
May 10, 2011Severe Storms and FloodingMajor disaster
Jul 2, 2010Severe Storms, Tornadoes, and FloodingMajor disaster
Apr 19, 2010FloodingMajor disaster
Mar 19, 2010FloodingEmergency
Apr 9, 2009Severe Storms and FloodingMajor disaster
Mar 26, 2009Severe Storms and FloodingEmergency
Jun 5, 2006FloodingMajor disaster
Show all 29
Sep 13, 2005Hurricane Katrina EvacuationEmergency
Jun 14, 2002Severe Storms, Flooding and TornadoesMajor disaster
May 16, 2001Severe Winter Storms, Flooding, and TornadoesMajor disaster
Aug 26, 1999Severe Ice Storm and FloodingMajor disaster
Apr 8, 1997Severe Flooding, High Winds,Severe StormsMajor disaster
Jan 16, 1997Severe Winter StormsMajor disaster
Jun 1, 1996Flooding and Severe StormsMajor disaster
Jun 11, 1993Severe Storms, Tornadoes & FloodingMajor disaster
May 8, 1989FloodingMajor disaster
Aug 6, 1987Severe Storms, Tornadoes & FloodingMajor disaster
Apr 30, 1979Severe Storms & FloodingMajor disaster
Jul 8, 1978Severe Storms, Flooding, Hail & TornadoesMajor disaster
Apr 22, 1978Storms, Ice Jams, Snowmelt & FloodingMajor disaster
Jun 17, 1976DroughtEmergency
Jul 17, 1975Severe Storms, Tornadoes & FloodingMajor disaster
Jul 22, 1970Heavy Rains & FloodingMajor disaster
Apr 18, 1969FloodingMajor disaster
Mar 22, 1966FloodingMajor disaster
Apr 11, 1965FloodingMajor disaster

Minnesota also had 26 statewide declarations that did not name single counties.

Storm history since 1955

Tornado risk by county ›

The National Weather Service has logged 887 storm reports in Polk County since 1955, with 4 deaths and 24 injuries and about $13.4 million in reported damage. The strongest on record here was an EF3 tornado on June 17, 2010 near Maple Bay.

82tornadoes
427hail reports, largest 3.5 inches
319damaging thunderstorm winds
54floods and flash floods

Strongest tornadoes

DateStrengthNearHurt / killed
Jun 17, 2010EF3Maple Bay2 / 1
Jul 5, 1978F2–9 / 1
Jun 29, 2018EF2Winger0 / 0
Jul 13, 1977F2–0 / 0
Jun 30, 1955F2–7 / 0

Most damaging storms

DateTypeNearDamage
Jun 29, 2018TornadoWinger$7M
Apr 1, 2006FloodCountywide$932K
Aug 8, 2001Thunderstorm WindEast Grand Forks$500K
May 30, 2011Thunderstorm WindCrookston$400K
Aug 31, 1975Tornado–$250K
Jul 9, 1966Tornado–$250K

Source: NOAA Storm Events Database, county-based reports through Jul 24, 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 Polk County

Check your address flood zone ›
0.5%of homes have federal flood insurance (102 policies)
0%of homes in mapped high-risk flood zones are insured
$36.3 millionpaid on 1,455 flood claims since 1978
1997costliest year, with $33.9 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 Polk County

$222,800median home value (Minnesota $329,300, US $332,700)
1971median year homes were built (Minnesota 1979, US 1980)
66%of homes built before 1980, before many modern wind, quake and flood building rules
5.4%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; 14,697 housing units.

Compare in Minnesota

All 87 ›
Largest countiesOverall riskTop hazard
Hennepin CountyHighInland flooding
Ramsey CountyHighInland flooding
Dakota CountyModerateInland flooding
Anoka CountyModerateInland flooding
Washington CountyModerateInland flooding
St. Louis CountyModerateCold wave
Olmsted CountyModerateInland flooding
Stearns CountyModerateInland flooding

Neighboring counties

CountyOverall riskDeclarations
Grand Forks County, NDLow36
Pennington CountyLow18
Marshall CountyVery Low28
Clearwater CountyVery Low14
Traill County, NDVery Low34
Norman CountyVery Low30
Mahnomen CountyVery Low18
Red Lake CountyVery Low21

Common questions about Polk County

What is the biggest natural hazard in Polk County?

Inland flooding has the highest expected yearly losses in Polk County, about $13.4 million a year in FEMA's estimate. Cold wave is second at $7.5 million.

How many federal disasters has Polk County had?

Polk County has been included in 29 federal disaster or emergency declarations for natural events since 1965, including 25 major disasters. The most recent was Severe Storms, Straight-Line Winds, and Flooding in July 2022.

Is Polk County a high-risk place to live?

Its overall rating is Relatively Low, 20th highest of 87 in Minnesota. 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 Polk County?

Standard home insurance does not cover flooding. About 1 in 200 homes in Polk 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 Polk County had?

NOAA records list 82 tornadoes in Polk County since 1950. The strongest was an EF3 tornado on June 17, 2010 near Maple Bay. The weather service has also logged 427 hail reports and 54 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.