Photo: Lrgjr72 · CC BY-SA 4.0FEMA expects less hazard damage per building in Grand Blanc than in 88% of U.S. towns, mostly from river and rain flooding
On FEMA’s National Risk Index, Grand Blanc gets an A for hazard risk: lower expected damage per building than 88% of U.S. towns, #167 of 701 in Michigan. Most of that expected damage is river and rain flooding (65%), then tornadoes (21%). Flood insurance has paid 19 claims here since 1981.
Graded on FEMA’s expected yearly building damage per dollar of building value (NRI v1.20, December 2025), weighted by where residents live; flood claims are shown, not graded. How hazard risk is graded
What stands out about Grand Blanc’s natural hazards
From FEMA’s model and FEMA’s records, below.
What Grand Blanc faces
Each hazard’s share of the building damage FEMA expects here, and how its rate compares with the rest of the country.
River and rain flooding
Tornadoes
Strong wind
Shares are of FEMA’s expected building damage, the measure the grade uses; ranks compare each hazard’s building-damage rate with all 85,154 U.S. census tracts. In FEMA’s terms, river and rain flooding is FEMA’s “Inland Flooding” (rivers and streams overflowing their banks, or rain overwhelming drainage). FEMA defines coastal flooding as high or rising tides and storm surge, so surge damage is counted there. Drought isn’t listed: FEMA counts its losses in crops only.
What’s behind Grand Blanc’s grade
River and rain flooding is 65% of the building damage FEMA expects in Grand Blanc, and Grand Blanc’s rate of river and rain flooding damage is lower than 81% of U.S. census tracts. Strong wind adds 8%, at a rate in the top 8% of U.S. census tracts.
A #167 of 701 in Michigan; lower expected damage per building than 88% of U.S. towns (21,298).
Grand Blanc’s residents live in 2 census tracts; FEMA’s figures are combined by where they live.
The typical Michigan town has lower expected damage than 77% of U.S. towns; within the state, Grand Blanc has less expected damage per building than 76% of Michigan towns.
In dollars, FEMA expects about $2.1M a year in losses across Grand Blanc: $1.2M to buildings, the rest to people and crops.
Does Grand Blanc flood? Sometimes: 19 flood claims since 1981
Every paid claim on a federal flood insurance policy in Grand Blanc, from FEMA’s records: 5.2 per 1,000 homes, more than 61% of the 13,809 U.S. towns with a flood insurance record.
Grand 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: Genesee County.1 federal disaster brought FEMA money to Grand Blanc
Disasters that paid out in Grand Blanc itself (aid to households or repair grants to the City of Grand Blanc), newest first, with that year’s flood claims.
- 2004Severe Storms, Tornadoes, and Flooding37 households applied for aid$18K aid approved
Genesee County has had 9 natural disasters declared by the President since 1953, most often floods, then severe storms. Not counted: the 2005 Hurricane Katrina evacuee emergency, which covered counties that took in evacuees.
Old photos of Grand Blanc after a storm or flood belong in the town’s history. Add one, or share what you remember below.
Add to the Grand Blanc archive →Get ready for what Grand Blanc faces
A short kit for the hazards that drive the building damage here, 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.
- Pick your spot now: the lowest floor, an inside room, no windows.
- A watch means be ready; a warning means take cover now.
- Keep shoes and a flashlight by the bed.
- Trim dead limbs over the house and driveway.
- Tie down trash cans and outdoor furniture.
- Stay clear of downed lines and call the utility.
- 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.
Questions about natural hazards in Grand Blanc
Is Grand Blanc at risk for natural disasters?
On FEMA’s National Risk Index, Grand Blanc has lower expected damage per building than 88% of U.S. towns: A for hazard risk, #167 of 701 in Michigan. Most of the expected damage is river and rain flooding (65%) and tornadoes (21%). This is FEMA’s model of an average year for today’s buildings, not a forecast.
Does Grand Blanc flood?
Flood insurance has paid 19 claims in Grand Blanc since 1981, $93K in all, or 5.2 per 1,000 homes, more than 61% of U.S. towns with a flood insurance record. 2 properties have flooded more than once.
Is Grand Blanc in a flood zone?
Flood zones are drawn street by street, so the answer depends on the address: look it up on FEMA’s flood map. In Genesee County, 20% of homes in mapped flood zones carry federal flood insurance, and 0.2% of all homes do.
How much is flood insurance in Grand Blanc?
FEMA’s Community Rating System list shows no discount for Grand Blanc’s flood program. Premiums depend on the building; policies usually start 30 days after you buy, so get a quote early.
What was the biggest storm in Grand Blanc?
By FEMA money that reached Grand Blanc, Severe Storms, Tornadoes, and Flooding (2004): 37 households applied for aid, $18K approved.
Is Grand Blanc at risk from river and rain flooding?
It is the largest share of the building damage FEMA expects here (65%), and Grand Blanc’s rate for it is lower than 81% of U.S. census tracts.
Storm stories
Memories, warnings and help from neighbors in Grand Blanc.
Sources: FEMA National Risk Index v1.20 (December 2025), census-tract table, combined by where Grand Blanc’s residents lived in the 2020 census; 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. Homes: Census ACS 2020–24. Preparedness tips: Ready.gov. FEMA’s model is an average of expected damage, not a forecast. How hazard risk is graded.