Gratiot County, Michigan: Natural Disaster Risk and History
Gratiot County, Michigan has a Relatively Low natural-hazard risk rating in FEMA's National Risk Index (v1.20, December 2025): a score of 54.1 out of 100, higher than about 54% of US counties, with strong winds, winter storms and tornadoes scoring highest of its 18 hazards and $17 million a year in expected losses.
OpenFEMA lists 10 federal disaster declarations that included Gratiot County since 1965, not counting 2 for COVID-19; the latest is DR-4925-MI (Severe Storms, Tornadoes, and Flooding, declared 30 June 2026). NOAA's Storm Prediction Center recorded 15 tornadoes touching Gratiot County from 1950 to 2025.
Live weather alerts for Michigan All official warnings Latest FEMA declarations
Population 41,742 Buildings worth $9.6 billion Area 577 sq mi Risk rank in Michigan 40 of 83 FIPS 26057
All 18 hazards, highest risk first
FEMA National Risk Index| Hazard | Risk rating | Score | Expected loss a year | How often | Events in record |
|---|---|---|---|---|---|
| Strong wind | Relatively High | 90.5 | $2.0 million | about 3.8 a year | 144 |
| Winter weather | Relatively High | 89.7 | $372,282 | about 16 a year | 304 |
| Tornado | Relatively Moderate | 73.0 | $2.6 million | about once every 4.1 years | 15 |
| Cold wave | Relatively Moderate | 67.2 | $1.8 million | about 2.2 a year | 42 |
| Inland flooding | Relatively Low | 63.0 | $9.2 million | about once every 2.8 years | 10 |
| Hail | Relatively Low | 59.0 | $339,774 | about 2.2 a year | 83 |
| Ice storm | Relatively Low | 52.0 | $87,041 | about 1.2 a year | 79 |
| Hurricane | Very Low | 39.0 | $25,858 | about once every 55 years | 6 |
| Landslide | Very Low | 33.0 | $360 | about once every 14 years | — |
| Earthquake | Very Low | 32.7 | $89,297 | rarer than once in 1,000 years | — |
| Heat wave | Very Low | 31.5 | $137,255 | about 1.9 a year | 31 |
| Lightning | Relatively Low | 24.4 | $79,426 | about 32 a year | 76,494 strikes |
| Wildfire | Very Low | 6.6 | $1,953 | rarer than once in 1,000 years | — |
| Drought | No Rating | 0.0 | — | — | 0 |
| Avalanche | Not Applicable | — | — | — | — |
| Coastal flooding | Not Applicable | — | — | — | — |
| Tsunami | Not Applicable | — | — | — | — |
| Volcanic activity | Not Applicable | — | — | — | — |
Score: FEMA's percentile among US counties that face the hazard (higher = more risk). Expected loss: FEMA's modelled average yearly loss to buildings, people (as a statistical value) and crops. How often: FEMA's annualised frequency of the hazard in the county; for some hazards it counts event-days, so it is a rough guide, not a forecast. "Not Applicable" means FEMA does not model that hazard here.
Federal disaster declarations 10
Most common: Flood 4, Snowstorm 2, Severe Storm 2, Hurricane 1.
| Decade | Declarations | Incident types |
|---|---|---|
| 1960s | 1 | Tornado |
| 1970s | 3 | Snowstorm, Severe Storm, Flood |
| 1980s | 2 | Flood ×2 |
| 1990s | 1 | Severe Storm |
| 2000s | 2 | Hurricane, Snowstorm |
| 2020s | 1 | Flood |
The last 10
Widest declarations that included Gratiot County
- Hurricane Katrina Evacuation (2005, EM-3225-MI): 83 Michigan counties designated.
- Blizzards & Snowstorms (1978, EM-3057-MI): 83 Michigan counties designated.
- Snow (2001, EM-3160-MI): 39 Michigan counties designated.
Named storms in its declarations: Hurricane Katrina (2005).
Not counted above: 2 COVID-19 ("Biological") declarations — in 2020 every US county was included. Michigan also had 3 statewide declarations with no county list.
Tornado record since 1950 15
| Tornadoes touching the county | 15 |
|---|---|
| Strongest-rated | (E)F2 ×9 |
| Peak month | May (5) |
| Deadliest | 12 May 1956, F2, 3.8 mi path, 1 killed, 4 injured |
| Longest path | 11 Apr 1965, F2, 15.1 mi path, 0 killed, 1 injured |
| Most recent | 10 Nov 2024, EF0, 2.4 mi path |
| Deaths / injuries on those paths | 2 / 8 |
| Rating | (E)F0 | (E)F1 | (E)F2 | (E)F3 | (E)F4 | (E)F5 | Unrated |
|---|---|---|---|---|---|---|---|
| Count | 5 | 1 | 9 | 0 | 0 | 0 | 0 |
| Decade | 1950s | 1960s | 1970s | 1980s | 1990s | 2000s | 2010s | 2020s |
|---|---|---|---|---|---|---|---|---|
| Count | 3 | 5 | 0 | 1 | 0 | 4 | 1 | 1 |
Deaths and injuries are for each tornado's whole path, which can run beyond this county. F-scale ratings before February 2007, Enhanced Fujita (EF) after.
How Gratiot County compares with its 5 nearest counties
| County | Distance | Overall risk | Score | Top hazard |
|---|---|---|---|---|
| Gratiot County (this page) | — | Relatively Low | 54.1 | Strong wind |
| Clinton County | 39 km | Relatively Low | 47.0 | Strong wind |
| Midland County | 43 km | Relatively Low | 71.9 | Strong wind |
| Isabella County | 43 km | Relatively Low | 66.1 | Winter weather |
| Montcalm County | 44 km | Relatively Low | 56.9 | Strong wind |
| Saginaw County | 45 km | Relatively Moderate | 88.5 | Winter weather |
Nearest by distance between county centres. Every county in Michigan, ranked.
Vulnerability and resilience
| Social vulnerability | Relatively Moderate 50.8 |
|---|---|
| Community resilience | Very High 85.3 |
| Community risk factor | 1.12 |
| Expected annual loss, all hazards | $17 million |
FEMA scales expected losses up where social vulnerability is high (people who may find it harder to prepare, evacuate or recover) and down where community resilience is high. A factor above 1 raises the risk score. For social vulnerability a high rating is worse; for resilience a high rating is better.
Prepare for Gratiot County's main hazards
- Right now: National Weather Service alerts for Michigan · all official warnings on Global Incident Tracker.
- Strong wind: Power outages now
- Winter weather: Power outages now · Carbon monoxide in winter
- Tornado: Is there a tornado warning now?
- Your property's flood zone: FEMA Flood Map Service Center ↗ — this page cannot tell you that.
- Official preparedness guidance: Ready.gov ↗ and your county emergency management office.
What this page shows, and what it misses
FEMA's National Risk Index rates a whole county against every other US county; it is a planning-level estimate for nationwide comparison, not a flood-zone map and not a substitute for a local risk assessment or the risk to one home. Declarations are presidential disaster, emergency and fire management declarations that named this county; state declarations and SBA or USDA designations are not included. Tornadoes are counted when the county is one of up to four listed on the track; 670 tornadoes that crossed a state line carry no county list in NOAA's file and are left out.
Federal Emergency Management Agency (FEMA), National Risk Index Dataset: National Risk Index Counties - v1.20.0 (December 2025). Retrieved from https://services.arcgis.com/XG15cJAlne2vxtgt/ArcGIS/rest/services/National_Risk_Index_Counties/FeatureServer/0/query on November 2, 2026, 1:20 PM EST. This product uses the Federal Emergency Management Agency’s National Risk Index dataset API or downloadable datasets but is not endorsed by FEMA. The Federal Government or FEMA cannot vouch for the data or analyses derived from these data after the data have been retrieved from the Agency's website(s).
Federal Emergency Management Agency (FEMA), OpenFEMA Dataset: Disaster Declarations Summaries - v2, retrieved from https://www.fema.gov/api/open/v2/DisasterDeclarationsSummaries on November 2, 2026, 1:21 PM EST. This product uses the Federal Emergency Management Agency's OpenFEMA API, but is not endorsed by FEMA. The Federal Government or FEMA cannot vouch for the data or analyses derived from these data after the data have been retrieved from the Agency's website(s).
Tornado records: NOAA/NWS Storm Prediction Center, Severe Weather Database, tornadoes 1950–2025 (https://www.spc.noaa.gov/wcm/data/1950-2025_actual_tornadoes.csv, downloaded 2 November 2026). Public domain; not endorsed by NOAA. Compiled by Global Incident Tracker.
Questions about Gratiot County
What natural disasters is Gratiot County, Michigan most at risk from?
Gratiot County, Michigan has a Relatively Low natural-hazard risk rating in FEMA's National Risk Index (v1.20, December 2025): a score of 54.1 out of 100, higher than about 54% of US counties, with strong winds, winter storms and tornadoes scoring highest of its 18 hazards and $17 million a year in expected losses.
How many federal disaster declarations has Gratiot County had?
OpenFEMA lists 10 federal disaster declarations that included Gratiot County since 1965, not counting 2 for COVID-19; the latest is DR-4925-MI (Severe Storms, Tornadoes, and Flooding, declared 30 June 2026). Another 3 Michigan declarations were made statewide without a county list.
How many tornadoes have hit Gratiot County?
NOAA's Storm Prediction Center recorded 15 tornadoes touching Gratiot County from 1950 to 2025. The deadliest: 12 May 1956, F2, 3.8 mi path, 1 killed, 4 injured (deaths and injuries are for the whole path).
Is the National Risk Index a flood zone map?
No. The National Risk Index is a planning-level estimate for a whole county, built for nationwide comparison. It does not tell you the flood zone or the risk of a single property: for that, look up the address on FEMA's Flood Map Service Center (msc.fema.gov) and ask your local floodplain manager.