Home › Iowa › Tama County

Tama County, Iowa

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

Relatively Low overall risk
31st of 99highest risk in Iowa
$13Mexpected losses a year
19federal declarations
1 in 250homes with flood insurance
Photo: U.S. Geological Survey, public domain

Tama County, Iowa has a relatively low overall risk from natural hazards in FEMA's National Risk Index. Its risk score is lower than 55% of US counties. It ranks 31st of 99 counties in Iowa. The costliest hazards here are inland flooding, drought and strong wind. FEMA estimates about $13 million a year in expected losses, or roughly $738 per resident. Since 1965 it has been included in 19 federal disaster or emergency declarations for natural events (18 major disasters). The most recent was in May 2024 (severe storms, tornadoes and flooding). Only 35 homes here carry federal flood insurance. Since 1978, federal flood insurance has paid about $1.5 million on 145 claims here, including $619,000 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 Tama County

$4.6 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.
$3.5 million a yearExpected losses. Damaging events about 17 times a year.
  • Check local water restrictions.
  • Choose drought-tolerant plants.
$1.4 million a yearExpected losses. Damaging events about 6 times a year.
  • Secure outdoor furniture and trash bins before storms.
  • Have trees near the house checked.
HazardRatingScoreExpected loss a year
Inland floodingLow42.4
$5M
DroughtHigh97.3
$3M
Strong windHigh85.8
$1M
TornadoLow57.4
$1M
Cold waveLow51.0
$877K
HailLow63.9
$382K
WildfireLow65.5
$109K
Winter weatherLow60.3
$80K
Heat waveVery Low21.6
$62K
Ice stormLow41.3
$49K
LightningVery Low11.5
$34K
EarthquakeVery Low21.7
$29K
HurricaneVery Low16.9
$4K
LandslideLow64.4
$3K

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 high in FEMA's measures.

Federal disaster history

Recent disasters nationwide ›

Declarations by decade

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

By type

Flood10
Severe Storm8
Hurricane1

Most recent

May 24, 2024Severe Storms, Tornadoes, and FloodingMajor disaster
Aug 17, 2020Severe StormsMajor disaster
Mar 23, 2019Severe Storms and FloodingMajor disaster
Aug 5, 2014Severe Storms, Tornadoes, Straight-Line Winds, and FloodingMajor disaster
Jul 2, 2013Severe Storms, Tornadoes, and FloodingMajor disaster
Aug 24, 2011Severe Storms, Straight-Line Winds, and FloodingMajor disaster
May 27, 2008Severe Storms, Tornadoes, and FloodingMajor disaster
Mar 14, 2007Severe Winter StormsMajor disaster
Sep 10, 2005Hurricane Katrina EvacuationEmergency
May 25, 2004Severe Storms, Tornadoes, and FloodingMajor disaster
Show all 19
Jul 2, 1998Severe Storms, Tornadoes and FloodingMajor disaster
Jul 9, 1993Severe Storms & FloodingMajor disaster
Apr 26, 1993Severe Storms & FloodingMajor disaster
Jul 12, 1991Severe Storms & FloodingMajor disaster
May 26, 1990Severe Storms & FloodingMajor disaster
Jun 24, 1974Severe Storms & FloodingMajor disaster
Aug 14, 1969Heavy Rains & FloodingMajor disaster
Apr 25, 1969FloodingMajor 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 419 storm reports in Tama County since 1953, with 1 death and 35 injuries and about $65.2 million in reported damage. The strongest on record here was an F4 tornado on May 24, 1989.

48tornadoes
109hail reports, largest 3.75 inches
153damaging thunderstorm winds
49floods and flash floods

Strongest tornadoes

DateStrengthNearHurt / killed
May 24, 1989F4–0 / 0
Apr 23, 1961F3–6 / 1
Nov 9, 1975F3–0 / 0
Apr 19, 1966F3–4 / 0
May 31, 1971F3–0 / 0

Most damaging storms

DateTypeNearDamage
May 24, 1989Tornado–$25M
Jun 12, 2010FloodLincoln$20M
Apr 23, 1961Tornado–$3M
Nov 9, 1975Tornado–$3M
Jun 29, 1998Thunderstorm WindToledo$1M
Jul 11, 2011Thunderstorm WindGarwin$1M

Source: NOAA Storm Events Database, county-based reports through Jul 30, 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 Tama County

Check your address flood zone ›
0.4%of homes have federal flood insurance (35 policies)
11.7%of homes in mapped high-risk flood zones are insured
$1.5 millionpaid on 145 flood claims since 1978
2008costliest year, with $619,004 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 Tama County

$148,600median home value (Iowa $208,000, US $332,700)
1957median year homes were built (Iowa 1972, US 1980)
76%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; 7,595 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
Black Hawk CountyLow18
Marshall CountyLow18
Jasper CountyLow17
Benton CountyVery Low16
Poweshiek CountyVery Low13
Iowa CountyVery Low21
Grundy CountyVery Low13

Common questions about Tama County

What is the biggest natural hazard in Tama County?

Inland flooding has the highest expected yearly losses in Tama County, about $4.6 million a year in FEMA's estimate. Drought is second at $3.5 million.

How many federal disasters has Tama County had?

Tama County has been included in 19 federal disaster or emergency declarations for natural events since 1965, including 18 major disasters. The most recent was Severe Storms, Tornadoes, and Flooding in May 2024.

Is Tama County a high-risk place to live?

Its overall rating is Relatively Low, 31st 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 Tama County?

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

NOAA records list 48 tornadoes in Tama County since 1950. The strongest was an F4 tornado on May 24, 1989. The weather service has also logged 109 hail reports and 49 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.