Isanti County, Minnesota
Natural disaster risk, federal disaster history and flood insurance facts.
Isanti County, Minnesota has a very low overall risk from natural hazards in FEMA's National Risk Index. Its risk score is lower than 73% of US counties. It ranks 59th of 87 counties in Minnesota. The costliest hazards here are inland flooding, tornadoes and cold waves. FEMA estimates about $15 million a year in expected losses, or roughly $372 per resident. Since 1965 it has been included in 8 federal disaster or emergency declarations for natural events (6 major disasters). The most recent was in July 2011 (severe storms, flooding and tornadoes). Fewer than 1 in 100 homes here carry federal flood insurance (63 policies). Since 1978, federal flood insurance has paid about $226,000 on 26 claims here.
FEMA National Risk Index December 2025; OpenFEMA declarations to Nov 6, 2026; NFIP records. Updated November 6, 2026.
Top risks in Isanti 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.
- Insulate pipes in outside walls, crawl spaces and garages.
- Know how to shut off the main water valve.
All 18 hazards
What the ratings mean ›| Hazard | Rating | Score | Expected loss a year | |
|---|---|---|---|---|
| Inland flooding | 44.0 | $9M | ||
| Tornado | 50.7 | $2M | ||
| Cold wave | 37.7 | $1M | ||
| Strong wind | 50.3 | $951K | ||
| Hail | 60.5 | $662K | ||
| Heat wave | 37.8 | $354K | ||
| Lightning | 42.5 | $303K | ||
| Wildfire | 65.0 | $206K | ||
| Drought | 32.3 | $56K | ||
| Ice storm | 27.8 | $48K | ||
| Winter weather | 25.1 | $40K | ||
| Earthquake | 2.6 | $4K | ||
| Landslide | 35.8 | $821 |
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 Isanti County. 2020s bar runs to November 2026.
By type
Most recent
Minnesota also had 26 statewide declarations that did not name single counties.
Storm history since 1975
Tornado risk by county ›The National Weather Service has logged 224 storm reports in Isanti County since 1975, with 0 deaths and 4 injuries and about $3 million in reported damage. The strongest on record here was an F2 tornado on June 13, 1981.
Strongest tornadoes
| Date | Strength | Near | Hurt / killed |
|---|---|---|---|
| Jun 13, 1981 | F2 | – | 0 / 0 |
| Jul 21, 1995 | F1 | Cambridge | 3 / 0 |
| Jun 18, 2001 | F1 | Day | 0 / 0 |
| Jul 21, 1995 | F1 | Spring Lake | 0 / 0 |
| Jul 21, 1995 | F1 | Blomford | 0 / 0 |
Most damaging storms
| Date | Type | Near | Damage |
|---|---|---|---|
| Jul 21, 1995 | Tornado | Cambridge | $2M |
| Jun 13, 1981 | Tornado | – | $250K |
| Jul 18, 2020 | Thunderstorm Wind | Springvale | $250K |
| Jun 18, 2001 | Tornado | Day | $200K |
| Jul 30, 2011 | Thunderstorm Wind | Carmody | $150K |
| Jul 30, 2011 | Tornado | Carmody | $150K |
Source: NOAA Storm Events Database, county-based reports through Jun 19, 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 Isanti 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 Isanti 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; 17,268 housing units.
Compare in Minnesota
All 87 ›| Largest counties | Overall risk | Top hazard |
|---|---|---|
| Hennepin County | Inland flooding | |
| Ramsey County | Inland flooding | |
| Dakota County | Inland flooding | |
| Anoka County | Inland flooding | |
| Washington County | Inland flooding | |
| St. Louis County | Cold wave | |
| Olmsted County | Inland flooding | |
| Stearns County | Inland flooding |
Neighboring counties
| County | Overall risk | Declarations |
|---|---|---|
| Anoka County | 11 | |
| Sherburne County | 8 | |
| Chisago County | 10 | |
| Pine County | 13 | |
| Mille Lacs County | 8 | |
| Kanabec County | 9 |
Common questions about Isanti County
What is the biggest natural hazard in Isanti County?
Inland flooding has the highest expected yearly losses in Isanti County, about $9.5 million a year in FEMA's estimate. Tornado is second at $2.2 million.
How many federal disasters has Isanti County had?
Isanti County has been included in 8 federal disaster or emergency declarations for natural events since 1965, including 6 major disasters. The most recent was Severe Storms, Flooding, and Tornadoes in July 2011.
Is Isanti County a high-risk place to live?
Its overall rating is Very Low, 59th highest of 87 in Minnesota. 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 Isanti County?
Standard home insurance does not cover flooding. About 1 in 333 homes in Isanti 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 Isanti County had?
NOAA records list 14 tornadoes in Isanti County since 1950. The strongest was an F2 tornado on June 13, 1981. The weather service has also logged 101 hail reports and 5 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.