Keweenaw County, Michigan
Natural disaster risk, federal disaster history and flood insurance facts.
Keweenaw County, Michigan has a very low overall risk from natural hazards in FEMA's National Risk Index. Its risk score is lower than 99% of US counties. It ranks 83rd of 83 counties in Michigan. The costliest hazards here are inland flooding, cold waves and winter weather. FEMA estimates about $609,000 a year in expected losses, or roughly $298 per resident. Since 1978 it has been included in 3 federal disaster or emergency declarations for natural events (1 major disaster). The most recent was in June 2013 (flooding). No homes here carry federal flood insurance.
FEMA National Risk Index December 2025; OpenFEMA declarations to Nov 6, 2026; NFIP records. Updated November 6, 2026.
Top risks in Keweenaw 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.
- Keep a winter kit in the car.
- Have food, water and medicine for several days at home.
All 18 hazards
What the ratings mean ›| Hazard | Rating | Score | Expected loss a year | |
|---|---|---|---|---|
| Inland flooding | 5.0 | $475K | ||
| Cold wave | 11.3 | $62K | ||
| Winter weather | 38.2 | $28K | ||
| Strong wind | 4.1 | $17K | ||
| Hail | 6.5 | $12K | ||
| Lightning | 3.0 | $6K | ||
| Ice storm | 10.1 | $3K | ||
| Wildfire | 15.3 | $3K | ||
| Tornado | 1.8 | $1K | ||
| Heat wave | 3.1 | $935 | ||
| Landslide | 4.7 | $4 | ||
| Drought | 12.6 | $3 | ||
| Coastal flooding | 14.8 | $0 |
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 very high in FEMA's measures.
Federal disaster history
Recent disasters nationwide ›Declarations by decade
Federal declarations for natural events that included Keweenaw County. 2020s bar runs to November 2026.
By type
Most recent
Michigan also had 6 statewide declarations that did not name single counties.
Storm history since 1955
Tornado risk by county ›The National Weather Service has logged 43 storm reports in Keweenaw County since 1955 and about $1.2 million in reported damage. The strongest on record here was an F0 tornado on July 11, 1987.
Strongest tornadoes
| Date | Strength | Near | Hurt / killed |
|---|---|---|---|
| Jul 11, 1987 | F0 | – | 0 / 0 |
| Aug 28, 2003 | F0 | Copper Harbor | 0 / 0 |
Most damaging storms
| Date | Type | Near | Damage |
|---|---|---|---|
| Apr 22, 2023 | Flood | Delaware | $1M |
| Apr 28, 2013 | Flood | Gay | $72K |
| May 11, 2006 | Flood | Copper Harbor | $60K |
| Jun 17, 2006 | Thunderstorm Wind | Phoenix | $40K |
| Jun 14, 1994 | Hail | Copper Harbor | $5K |
| Jun 14, 1994 | Thunderstorm Wind | Copper Harbor | $5K |
Source: NOAA Storm Events Database, county-based reports through Jul 12, 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 Keweenaw 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 Keweenaw 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; 2,305 housing units.
Compare in Michigan
All 83 ›| Largest counties | Overall risk | Top hazard |
|---|---|---|
| Wayne County | Inland flooding | |
| Oakland County | Inland flooding | |
| Macomb County | Inland flooding | |
| Kent County | Inland flooding | |
| Genesee County | Inland flooding | |
| Washtenaw County | Inland flooding | |
| Ottawa County | Inland flooding | |
| Ingham County | Inland flooding |
Neighboring counties
| County | Overall risk | Declarations |
|---|---|---|
| Marquette County | 9 | |
| Houghton County | 7 | |
| Alger County | 3 | |
| Ontonagon County | 6 | |
| Cook County, MN | 8 |
Common questions about Keweenaw County
What is the biggest natural hazard in Keweenaw County?
Inland flooding has the highest expected yearly losses in Keweenaw County, about $474,690 a year in FEMA's estimate. Cold wave is second at $62,288.
How many federal disasters has Keweenaw County had?
Keweenaw County has been included in 3 federal disaster or emergency declarations for natural events since 1978, including 1 major disaster. The most recent was Flooding in June 2013.
Is Keweenaw County a high-risk place to live?
Its overall rating is Very Low, 83rd highest of 83 in Michigan. 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 Keweenaw County?
Standard home insurance does not cover flooding. Lenders require it in mapped high-risk zones, but many flood claims come from outside those zones.
How many tornadoes has Keweenaw County had?
NOAA records list 2 tornadoes in Keweenaw County since 1950. The strongest was an F0 tornado on July 11, 1987. The weather service has also logged 8 hail reports and 4 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.