Bois Blanc is calmer than 99% of U.S. communities
Most of the natural-hazard damage FEMA expects in Bois Blanc comes from inland flooding, and overall the risk is very low for a U.S. community. Flood insurance has paid 1 claim here since 2017.
What stands out about Bois Blanc’s weather risks
Read from FEMA’s records below. The page puts what stands out first.
How exposed is Bois Blanc?
FEMA expects yearly storm and flood damage to homes and buildings here to be higher than in 1% of U.S. communities, mostly from inland flooding and cold waves.
Calmer than 1,748 of the 1,771 Michigan towns we cover.
Bois Blanc covers 1 census tract, combined by population.
What Bois Blanc faces
Each hazard’s share of the damage FEMA expects here, and how it compares with the rest of the country.
Inland flooding
Cold waves
Does Bois Blanc flood? Rarely: 1 flood claim since 2017
Every paid claim on a federal flood insurance policy in Bois Blanc, from FEMA’s records.
Bois Blanc isn’t in FEMA’s Community Rating System, which cuts flood insurance up to 45% in towns that do extra flood-proofing.
Insurance rates: Mackinac County.Federal disasters declared here
None of the disasters declared for Mackinac County shows FEMA aid or repair money reaching Bois Blanc itself in FEMA’s records.
Mackinac County has had 5 natural disasters declared since 1953, most often ice storms and hurricanes.
Get ready for what Bois Blanc actually faces
A short kit for its top hazards, what to check before you buy, and where neighbors get alerts.
- Turn around at flooded roads: a foot of moving water can carry off a car.
- Flood insurance usually takes 30 days to start, so buy it before the forecast.
- Keep papers and medicines up high, in a grab-and-go bag.
- Let faucets drip so pipes don’t freeze.
- Know where your water shutoff is.
- Never heat the house with the oven or a grill.
- Keep a shovel, a blanket and snacks in the car.
- Clear snow from furnace and dryer vents.
- Check on older neighbors when the power goes out.
- Look up the address on FEMA’s flood map.
- Ask the seller or landlord whether it has ever flooded, and what flood insurance costs there.
- Get a flood insurance quote early: policies usually start 30 days after you buy.
Know where neighbors sign up for alerts? Add it to the Handbook so everyone has it.
Bois Blanc and its neighbors
How storm and flood risk compares across the town line. Tap a town to see its hazards.
| Town | Rating | Mostly | Flood claims |
|---|---|---|---|
| Bois Blanc | Very low | inland flooding | 1 |
| Mackinac Island | Very low | inland flooding | 0 |
Rating = expected yearly storm and flood damage as a share of what’s there, vs. U.S. communities. Flood claims = paid federal flood insurance claims on record.
What these numbers can and can’t tell you
- An average, not a forecast. FEMA’s National Risk Index estimates the damage 18 kinds of natural hazards cause in a typical year, from decades of records and models. A quiet decade can follow a bad year.
- Compared by rate. “Higher than N%” compares yearly damage as a share of what’s there, so a big city isn’t rated riskier just for having more buildings.
- Money that reached town. Flood claims are matched to Bois Blanc’s own flood-insurance community (here, the census tracts inside it); household aid to the registrant’s city; repair grants to the Township of Bois Blanc.
- It follows property value. FEMA’s model weighs damage to buildings, so a place that recently lost many homes can rate lower than it feels. Across Bois Blanc, expected losses total about $473K a year, counting buildings, people and crops.
Storm stories
Memories, warnings and help from neighbors in Bois Blanc.
Your answer becomes a post in Town Square.
Sources: FEMA National Risk Index (December 2025); OpenFEMA: NFIP redacted claims, multiple-loss properties, community status book and residential penetration rates, housing assistance (owners and renters), public assistance funded projects, hazard mitigation properties and disaster declarations. Census tracts: U.S. Census Bureau. Preparedness tips: Ready.gov. An average of past damage, not a forecast.