Adams County, Wisconsin
Natural disaster risk, federal disaster history and flood insurance facts.
Adams County, Wisconsin has a relatively low overall risk from natural hazards in FEMA's National Risk Index. Its risk score is higher than 71% of US counties. It ranks 23rd of 72 counties in Wisconsin. The costliest hazards here are inland flooding, cold waves and tornadoes. FEMA estimates about $20 million a year in expected losses, or roughly $953 per resident. Since 1976 it has been included in 10 federal disaster or emergency declarations for natural events (8 major disasters). The most recent was in October 2018 (severe storms, tornadoes, straight-line winds, flooding and landslides). Only 34 homes here carry federal flood insurance. Since 1978, federal flood insurance has paid about $90,000 on 32 claims here.
FEMA National Risk Index December 2025; OpenFEMA declarations to Nov 6, 2026; NFIP records. Updated November 6, 2026.
Top risks in Adams 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.
- Insulate pipes in outside walls, crawl spaces and garages.
- Know how to shut off the main water valve.
- 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.
All 18 hazards
What the ratings mean ›| Hazard | Rating | Score | Expected loss a year | |
|---|---|---|---|---|
| Inland flooding | 72.5 | $10M | ||
| Cold wave | 90.4 | $5M | ||
| Tornado | 73.4 | $2M | ||
| Hail | 92.6 | $1M | ||
| Strong wind | 76.3 | $773K | ||
| Heat wave | 72.4 | $678K | ||
| Lightning | 32.5 | $80K | ||
| Drought | 40.6 | $47K | ||
| Ice storm | 45.6 | $47K | ||
| Wildfire | 53.1 | $37K | ||
| Winter weather | 44.6 | $36K | ||
| Earthquake | 21.2 | $21K | ||
| Hurricane | 9.5 | $1K | ||
| Landslide | 50.4 | $910 |
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 high and community resilience is relatively low in FEMA's measures.
Federal disaster history
Recent disasters nationwide ›Declarations by decade
Federal declarations for natural events that included Adams County. 2020s bar runs to November 2026.
By type
Most recent
Wisconsin also had 8 statewide declarations that did not name single counties.
Storm history since 1966
Tornado risk by county ›The National Weather Service has logged 330 storm reports in Adams County since 1966, with 0 deaths and 27 injuries and about $19.1 million in reported damage. The strongest on record here was an EF2 tornado on April 10, 2011 near Causeway.
Strongest tornadoes
| Date | Strength | Near | Hurt / killed |
|---|---|---|---|
| Apr 10, 2011 | EF2 | Causeway | 0 / 0 |
| Jul 10, 1984 | F2 | – | 0 / 0 |
| Jul 19, 1980 | F2 | – | 0 / 0 |
| Apr 10, 2011 | EF1 | Big Flats | 0 / 0 |
| May 18, 1971 | F1 | – | 5 / 0 |
Most damaging storms
| Date | Type | Near | Damage |
|---|---|---|---|
| Aug 28, 2018 | Thunderstorm Wind | Plainville | $6M |
| Apr 10, 2011 | Tornado | Causeway | $3M |
| Jul 10, 1984 | Tornado | – | $3M |
| Jul 6, 2017 | Hail | Big Flats | $1M |
| Aug 28, 2018 | Flash Flood | Easton | $805K |
| Mar 14, 2019 | Flood | New Rome | $750K |
Source: NOAA Storm Events Database, county-based reports through Jul 1, 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 Adams 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 Adams 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; 17,008 housing units.
Compare in Wisconsin
All 72 ›| Largest counties | Overall risk | Top hazard |
|---|---|---|
| Milwaukee County | Cold wave | |
| Dane County | Inland flooding | |
| Waukesha County | Inland flooding | |
| Brown County | Inland flooding | |
| Racine County | Inland flooding | |
| Outagamie County | Inland flooding | |
| Winnebago County | Inland flooding | |
| Kenosha County | Cold wave |
Neighboring counties
| County | Overall risk | Declarations |
|---|---|---|
| Wood County | 11 | |
| Portage County | 10 | |
| Columbia County | 9 | |
| Juneau County | 14 | |
| Waushara County | 8 | |
| Marquette County | 7 |
Common questions about Adams County
What is the biggest natural hazard in Adams County?
Inland flooding has the highest expected yearly losses in Adams County, about $9.6 million a year in FEMA's estimate. Cold wave is second at $5 million.
How many federal disasters has Adams County had?
Adams County has been included in 10 federal disaster or emergency declarations for natural events since 1976, including 8 major disasters. The most recent was Severe Storms, Tornadoes, Straight-Line Winds, Flooding, and Landslides in October 2018.
Is Adams County a high-risk place to live?
Its overall rating is Relatively Low, 23rd highest of 72 in Wisconsin. 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 Adams County?
Standard home insurance does not cover flooding. About 1 in 500 homes in Adams 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 Adams County had?
NOAA records list 18 tornadoes in Adams County since 1950. The strongest was an EF2 tornado on April 10, 2011 near Causeway. The weather service has also logged 109 hail reports and 19 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.