Linn County, Iowa
Natural disaster risk, federal disaster history and flood insurance facts.
Linn County, Iowa has a moderate overall risk from natural hazards in FEMA's National Risk Index. Its risk score is higher than 87% of US counties. It ranks 3rd of 99 counties in Iowa. The costliest hazards here are inland flooding, tornadoes and strong wind. FEMA estimates about $79 million a year in expected losses, or roughly $344 per resident. Since 1965 it has been included in 21 federal disaster or emergency declarations for natural events (20 major disasters). The most recent was in August 2020 (severe storms). Fewer than 1 in 100 homes here carry federal flood insurance (655 policies). Since 1978, federal flood insurance has paid about $69 million on 1,351 claims here, including $64 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 Linn 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.
- 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.
- 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 | 86.7 | $36M | ||
| Tornado | 95.5 | $16M | ||
| Strong wind | 98.4 | $8M | ||
| Hail | 97.6 | $7M | ||
| Cold wave | 83.9 | $6M | ||
| Drought | 87.7 | $2M | ||
| Lightning | 85.1 | $1M | ||
| Heat wave | 69.2 | $1M | ||
| Ice storm | 85.9 | $805K | ||
| Winter weather | 94.5 | $787K | ||
| Earthquake | 57.2 | $498K | ||
| Wildfire | 47.0 | $49K | ||
| Landslide | 68.3 | $6K | ||
| Hurricane | 16.3 | $5K |
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 very 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 Linn County. 2020s bar runs to November 2026.
By type
Most recent
Show all 21
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 1,164 storm reports in Linn County since 1953, with 6 deaths and 248 injuries and about $804 million in reported damage. The strongest on record here was an F4 tornado on March 13, 1990.
Strongest tornadoes
| Date | Strength | Near | Hurt / killed |
|---|---|---|---|
| Mar 13, 1990 | F4 | – | 0 / 0 |
| Apr 30, 1954 | F4 | – | 0 / 0 |
| May 21, 2004 | F3 | Palo | 0 / 0 |
| May 20, 1953 | F3 | – | 4 / 0 |
| Sep 28, 1972 | F2 | – | 3 / 0 |
Most damaging storms
| Date | Type | Near | Damage |
|---|---|---|---|
| Jun 1, 2008 | Flood | Center Pt | $750M |
| Mar 13, 1990 | Tornado | – | $25M |
| Jul 20, 2003 | Thunderstorm Wind | Cedar Rapids | $5M |
| May 10, 2003 | Hail | Fairfax | $3M |
| Sep 28, 1972 | Tornado | – | $3M |
| Sep 26, 2016 | Flood | Covington | $2M |
Source: NOAA Storm Events Database, county-based reports through Jul 31, 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 Linn 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 Linn 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; 103,104 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 |
|---|---|---|
| Johnson County | 22 | |
| Benton County | 16 | |
| Jones County | 20 | |
| Buchanan County | 23 | |
| Cedar County | 16 | |
| Delaware County | 16 | |
| Iowa County | 21 |
Cities in Linn County
Common questions about Linn County
What is the biggest natural hazard in Linn County?
Inland flooding has the highest expected yearly losses in Linn County, about $36.2 million a year in FEMA's estimate. Tornado is second at $16.2 million.
How many federal disasters has Linn County had?
Linn County has been included in 21 federal disaster or emergency declarations for natural events since 1965, including 20 major disasters. The most recent was Severe Storms in August 2020.
Is Linn County a high-risk place to live?
Its overall rating is Relatively Moderate, 3rd 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 Linn County?
Standard home insurance does not cover flooding. About 1 in 143 homes in Linn 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 Linn County had?
NOAA records list 65 tornadoes in Linn County since 1950. The strongest was an F4 tornado on March 13, 1990. The weather service has also logged 390 hail reports and 81 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.