St. Louis County, Minnesota
Natural disaster risk, federal disaster history and flood insurance facts.
St. Louis County, Minnesota has a moderate overall risk from natural hazards in FEMA's National Risk Index. Its risk score is higher than 92% of US counties. It ranks 3rd of 87 counties in Minnesota. The costliest hazards here are cold waves, inland flooding and lightning. FEMA estimates about $112 million a year in expected losses, or roughly $562 per resident. Since 1970 it has been included in 15 federal disaster or emergency declarations for natural events (12 major disasters). The most recent was in May 2025 (Munger Shaw Fire). Fewer than 1 in 100 homes here carry federal flood insurance (290 policies). Since 1978, federal flood insurance has paid about $1.8 million on 183 claims here, including $1.0 million for floods in 2012.
FEMA National Risk Index December 2025; OpenFEMA declarations to Nov 6, 2026; NFIP records. Updated November 6, 2026.
Top risks in St. Louis County
- Insulate pipes in outside walls, crawl spaces and garages.
- Know how to shut off the main water valve.
- 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.
- Go indoors when you hear thunder.
- Use surge protectors for electronics.
All 18 hazards
What the ratings mean ›| Hazard | Rating | Score | Expected loss a year | |
|---|---|---|---|---|
| Cold wave | 99.4 | $51M | ||
| Inland flooding | 91.8 | $50M | ||
| Lightning | 97.6 | $3M | ||
| Heat wave | 86.5 | $2M | ||
| Tornado | 64.7 | $2M | ||
| Winter weather | 98.0 | $1M | ||
| Hail | 84.0 | $1M | ||
| Strong wind | 71.3 | $1M | ||
| Wildfire | 81.7 | $512K | ||
| Ice storm | 63.6 | $168K | ||
| Drought | 42.2 | $89K | ||
| Coastal flooding | 35.0 | $9K | ||
| Earthquake | 3.2 | $3K | ||
| Landslide | 57.4 | $2K |
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 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 St. Louis County. 2020s bar runs to November 2026.
By type
Most recent
Show all 15
Minnesota also had 26 statewide declarations that did not name single counties.
Storm history since 1953
Tornado risk by county ›The National Weather Service has logged 1,356 storm reports in St. Louis County since 1953, with 6 deaths and 69 injuries and about $62.4 million in reported damage. The strongest on record here was an F3 tornado on August 6, 1969.
Strongest tornadoes
| Date | Strength | Near | Hurt / killed |
|---|---|---|---|
| Aug 6, 1969 | F3 | – | 3 / 2 |
| Aug 6, 1969 | F3 | – | 20 / 0 |
| Aug 6, 1969 | F3 | – | 9 / 0 |
| Aug 6, 1969 | F3 | – | 0 / 0 |
| Aug 6, 1969 | F3 | – | 0 / 0 |
Most damaging storms
| Date | Type | Near | Damage |
|---|---|---|---|
| Aug 23, 1998 | Hail | Duluth | $50M |
| Aug 6, 1969 | Tornado | – | $3M |
| Aug 6, 1969 | Tornado | – | $3M |
| Jul 1, 2022 | Flood | Winton | $1M |
| Jun 19, 2024 | Flood | Cook | $1M |
| Aug 6, 1996 | Lightning | Hibbing | $400K |
Source: NOAA Storm Events Database, county-based reports through Jul 27, 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 St. Louis 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 St. Louis 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; 104,263 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 |
|---|---|---|
| Itasca County | 13 | |
| Douglas County, WI | 8 | |
| Carlton County | 8 | |
| Aitkin County | 19 | |
| Koochiching County | 10 | |
| Lake County | 10 |
Cities in St. Louis County
Common questions about St. Louis County
What is the biggest natural hazard in St. Louis County?
Cold wave has the highest expected yearly losses in St. Louis County, about $50.6 million a year in FEMA's estimate. Inland flooding is second at $49.8 million.
How many federal disasters has St. Louis County had?
St. Louis County has been included in 15 federal disaster or emergency declarations for natural events since 1970, including 12 major disasters. The most recent was Munger Shaw Fire in May 2025.
Is St. Louis County a high-risk place to live?
Its overall rating is Relatively Moderate, 3rd 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 St. Louis County?
Standard home insurance does not cover flooding. About 1 in 333 homes in St. Louis 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 St. Louis County had?
NOAA records list 43 tornadoes in St. Louis County since 1950. The strongest was an F3 tornado on August 6, 1969. The weather service has also logged 530 hail reports and 104 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.