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Cerro Gordo County, Iowa

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

Relatively Low overall risk
8th of 99highest risk in Iowa
$27Mexpected losses a year
13federal declarations
1 in 250homes with flood insurance
Photo: U.S. Geological Survey, public domain

Cerro Gordo County, Iowa has a relatively low overall risk from natural hazards in FEMA's National Risk Index. Its risk score is higher than 70% of US counties. It ranks 8th of 99 counties in Iowa. The costliest hazards here are inland flooding, tornadoes and drought. FEMA estimates about $27 million a year in expected losses, or roughly $634 per resident. Since 1965 it has been included in 13 federal disaster or emergency declarations for natural events (12 major disasters). The most recent was in August 2018 (severe storms, tornadoes, straight-line winds and flooding). Fewer than 1 in 100 homes here carry federal flood insurance (80 policies). Since 1978, federal flood insurance has paid about $3.5 million on 216 claims here, including $2.9 million for floods in 2008.

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

Top risks in Cerro Gordo County

$12.1 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.

Tornado

Moderate
$6.5 million 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.
$4 million a yearExpected losses. Damaging events about 24 times a year.
  • Check local water restrictions.
  • Choose drought-tolerant plants.
HazardRatingScoreExpected loss a year
Inland floodingLow69.0
$12M
TornadoModerate89.3
$7M
DroughtHigh97.6
$4M
Cold waveModerate74.5
$3M
Strong windModerate70.1
$942K
HailModerate76.1
$697K
Winter weatherHigh88.1
$343K
LightningVery Low21.0
$70K
Heat waveVery Low19.9
$59K
Ice stormLow42.1
$57K
EarthquakeVery Low24.2
$40K
WildfireVery Low26.7
$11K
HurricaneVery Low11.5
$2K
LandslideVery Low34.3
$411

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 very high in FEMA's measures.

Federal disaster history

Recent disasters nationwide ›

Declarations by decade

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

By type

Flood6
Severe Storm4
Tornado1
Severe Ice Storm1
Hurricane1

Most recent

Aug 20, 2018Severe Storms, Tornadoes, Straight-Line Winds, and FloodingMajor disaster
Oct 31, 2016Severe Storms and FloodingMajor disaster
May 27, 2008Severe Storms, Tornadoes, and FloodingMajor disaster
Sep 10, 2005Hurricane Katrina EvacuationEmergency
May 25, 2004Severe Storms, Tornadoes, and FloodingMajor disaster
Jul 22, 1999Severe Storms and FloodingMajor disaster
Jul 2, 1998Severe Storms, Tornadoes and FloodingMajor disaster
Jul 9, 1993Severe Storms & FloodingMajor disaster
Dec 26, 1991Ice StormMajor disaster
Sep 6, 1990Severe Storms & FloodingMajor disaster
Show all 13
Jul 1, 1979High Winds & TornadoesMajor disaster
Aug 14, 1969Heavy Rains & FloodingMajor disaster
Apr 22, 1965FloodingMajor disaster

Iowa also had 11 statewide declarations that did not name single counties.

Storm history since 1953

Tornado risk by county ›

The National Weather Service has logged 591 storm reports in Cerro Gordo County since 1953, with 1 death and 14 injuries and about $37.1 million in reported damage. The strongest on record here was an F4 tornado on May 10, 1953.

39tornadoes
184hail reports, largest 3 inches
223damaging thunderstorm winds
59floods and flash floods

Strongest tornadoes

DateStrengthNearHurt / killed
May 10, 1953F4–0 / 0
Apr 30, 1967F3–0 / 0
Jun 27, 1998F2Swaledale0 / 0
Dec 15, 2021EF2Meservey0 / 0
Jun 27, 1998F2Thornton0 / 0

Most damaging storms

DateTypeNearDamage
Jun 12, 2010FloodClear Lake Lake$20M
Jun 22, 1984Tornado–$3M
Jun 7, 2008FloodPortland$2M
Jul 19, 1999Flash FloodMason City$1M
Jun 8, 2018FloodClear Lake Lake$600K
Jun 12, 1994Thunderstorm WindMason City Arpt$501K

Source: NOAA Storm Events Database, county-based reports through Sep 16, 2025. 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 Cerro Gordo County

Check your address flood zone ›
0.4%of homes have federal flood insurance (80 policies)
11.8%of homes in mapped high-risk flood zones are insured
$3.5 millionpaid on 216 flood claims since 1978
2008costliest year, with $2.9 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 Cerro Gordo County

$166,400median home value (Iowa $208,000, US $332,700)
1959median year homes were built (Iowa 1972, US 1980)
74%of homes built before 1980, before many modern wind, quake and flood building rules
3.2%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; 22,786 housing units.

Compare in Iowa

All 99 ›
Largest countiesOverall riskTop hazard
Polk CountyModerateInland flooding
Linn CountyModerateInland flooding
Scott CountyModerateInland flooding
Johnson CountyModerateTornado
Black Hawk CountyLowInland flooding
Woodbury CountyModerateInland flooding
Dallas CountyLowInland flooding
Dubuque CountyLowInland flooding

Neighboring counties

CountyOverall riskDeclarations
Floyd CountyLow18
Butler CountyVery Low23
Wright CountyVery Low22
Hancock CountyVery Low13
Winnebago CountyVery Low14
Mitchell CountyVery Low18
Franklin CountyVery Low20
Worth CountyVery Low14

Cities in Cerro Gordo County

Common questions about Cerro Gordo County

What is the biggest natural hazard in Cerro Gordo County?

Inland flooding has the highest expected yearly losses in Cerro Gordo County, about $12.1 million a year in FEMA's estimate. Tornado is second at $6.5 million.

How many federal disasters has Cerro Gordo County had?

Cerro Gordo County has been included in 13 federal disaster or emergency declarations for natural events since 1965, including 12 major disasters. The most recent was Severe Storms, Tornadoes, Straight-Line Winds, and Flooding in August 2018.

Is Cerro Gordo County a high-risk place to live?

Its overall rating is Relatively Low, 8th highest of 99 in Iowa. 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 Cerro Gordo County?

Standard home insurance does not cover flooding. About 1 in 250 homes in Cerro Gordo 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 Cerro Gordo County had?

NOAA records list 39 tornadoes in Cerro Gordo County since 1950. The strongest was an F4 tornado on May 10, 1953. The weather service has also logged 184 hail reports and 59 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.