Tama County, Iowa
Natural disaster risk, federal disaster history and flood insurance facts.
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
- 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.
- Check local water restrictions.
- Choose drought-tolerant plants.
- Secure outdoor furniture and trash bins before storms.
- Have trees near the house checked.
All 18 hazards
What the ratings mean ›| Hazard | Rating | Score | Expected loss a year | |
|---|---|---|---|---|
| Inland flooding | 42.4 | $5M | ||
| Drought | 97.3 | $3M | ||
| Strong wind | 85.8 | $1M | ||
| Tornado | 57.4 | $1M | ||
| Cold wave | 51.0 | $877K | ||
| Hail | 63.9 | $382K | ||
| Wildfire | 65.5 | $109K | ||
| Winter weather | 60.3 | $80K | ||
| Heat wave | 21.6 | $62K | ||
| Ice storm | 41.3 | $49K | ||
| Lightning | 11.5 | $34K | ||
| Earthquake | 21.7 | $29K | ||
| Hurricane | 16.9 | $4K | ||
| Landslide | 64.4 | $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
Most recent
Show all 19
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.
Strongest tornadoes
| Date | Strength | Near | Hurt / killed |
|---|---|---|---|
| May 24, 1989 | F4 | – | 0 / 0 |
| Apr 23, 1961 | F3 | – | 6 / 1 |
| Nov 9, 1975 | F3 | – | 0 / 0 |
| Apr 19, 1966 | F3 | – | 4 / 0 |
| May 31, 1971 | F3 | – | 0 / 0 |
Most damaging storms
| Date | Type | Near | Damage |
|---|---|---|---|
| May 24, 1989 | Tornado | – | $25M |
| Jun 12, 2010 | Flood | Lincoln | $20M |
| Apr 23, 1961 | Tornado | – | $3M |
| Nov 9, 1975 | Tornado | – | $3M |
| Jun 29, 1998 | Thunderstorm Wind | Toledo | $1M |
| Jul 11, 2011 | Thunderstorm Wind | Garwin | $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 ›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
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 counties | Overall risk | Top hazard |
|---|---|---|
| Polk County | Inland flooding | |
| Linn County | Inland flooding | |
| Scott County | Inland flooding | |
| Johnson County | Tornado | |
| Black Hawk County | Inland flooding | |
| Woodbury County | Inland flooding | |
| Dallas County | Inland flooding | |
| Dubuque County | Inland flooding |
Neighboring counties
| County | Overall risk | Declarations |
|---|---|---|
| Black Hawk County | 18 | |
| Marshall County | 18 | |
| Jasper County | 17 | |
| Benton County | 16 | |
| Poweshiek County | 13 | |
| Iowa County | 21 | |
| Grundy County | 13 |
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.