Photo: Jamie Begin · CC BY-SA 4.0FEMA puts Chelsea’s expected hazard damage per building below that of 97% of U.S. towns, mostly from river and rain flooding
On FEMA’s National Risk Index, Chelsea gets an A+ for hazard risk: lower expected damage per building than 97% of U.S. towns, #36 of 701 in Michigan. Most of that expected damage is river and rain flooding (58%), then tornadoes (24%). FEMA’s files show no paid flood insurance claims here.
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 Chelsea 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 Chelsea’s grade
River and rain flooding is 58% of the building damage FEMA expects in Chelsea, and Chelsea’s rate of river and rain flooding damage is lower than 94% of U.S. census tracts. Strong wind adds 10%, at a rate in the top 8% of U.S. census tracts.
A+ #36 of 701 in Michigan; lower expected damage per building than 97% of U.S. towns (21,298).
Chelsea’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, Chelsea has less expected damage per building than 95% of Michigan towns.
In dollars, FEMA expects about $1.5M a year in losses across Chelsea: $1.1M to buildings, the rest to people and crops.
Does Chelsea flood? No paid flood claims on record
FEMA’s records show no paid flood insurance claims in Chelsea. That’s not a promise: most homes don’t carry flood insurance, so small floods go unrecorded.
Chelsea isn’t in FEMA’s Community Rating System, which cuts flood insurance up to 45% in towns that do extra flood-proofing.
Insurance rates: Washtenaw County.3 federal disasters brought FEMA money to Chelsea
Disasters that paid out in Chelsea itself (aid to households or repair grants to the City of Chelsea), newest first, with that year’s flood claims.
- 2004Severe Storms, Tornadoes, and Flooding1 households applied for aid$2K aid approved
- 2000Snow$8K to the City of Chelsea for repairs
- 1999Mi - Severe Weather 1/2 /99$6K to the City of Chelsea for repairs
Washtenaw County has had 8 natural disasters declared by the President since 1953, most often severe storms, then winter storms. Not counted: the 2005 Hurricane Katrina evacuee emergency, which covered counties that took in evacuees.
Old photos of Chelsea after a storm or flood belong in the town’s history. Add one, or share what you remember below.
Add to the Chelsea archive →Chelsea and its neighbors
Chelsea has the lowest expected damage per building of the 3 graded towns here. Tap a town to see its hazards.
| Town | Hazard risk | Mostly (buildings) | Flood claims |
|---|---|---|---|
| Chelsea | A+less damage than 97% | river and rain flooding | 0 |
| Sylvan Township | Aless damage than 87% | river and rain flooding | — |
| Lima Township | Aless damage than 86% | river and rain flooding | — |
Hazard risk = FEMA’s expected yearly building damage per dollar of building value, vs. the 21,298 U.S. towns we grade; the map is shaded by fifths of the same scale. Flood claims = paid federal flood insurance claims on record.
Get ready for what Chelsea 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 Chelsea
Is Chelsea at risk for natural disasters?
On FEMA’s National Risk Index, Chelsea has lower expected damage per building than 97% of U.S. towns: A+ for hazard risk, #36 of 701 in Michigan. Most of the expected damage is river and rain flooding (58%) and tornadoes (24%). This is FEMA’s model of an average year for today’s buildings, not a forecast.
Is Chelsea 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 Washtenaw County, 25% of homes in mapped flood zones carry federal flood insurance, and 0.4% of all homes do.
How much is flood insurance in Chelsea?
FEMA’s Community Rating System list shows no discount for Chelsea’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 Chelsea?
By FEMA money that reached Chelsea, Snow (2000): $8K to the City of Chelsea for repairs.
Is Chelsea at risk from river and rain flooding?
It is the largest share of the building damage FEMA expects here (58%), and Chelsea’s rate for it is lower than 94% of U.S. census tracts.
Storm stories
Memories, warnings and help from neighbors in Chelsea.
Sources: FEMA National Risk Index v1.20 (December 2025), census-tract table, combined by where Chelsea’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.