Mason District Number 5 Schoolhouse · Photo: Jsgoodrich · CC BY-SA 3.0FEMA puts Mason Township’s expected hazard damage per building below that of 94% of U.S. towns, mostly from river and rain flooding
On FEMA’s National Risk Index, Mason Township gets an A for hazard risk: lower expected damage per building than 94% of U.S. towns, #63 of 701 in Michigan. Most of that expected damage is river and rain flooding (74%), then tornadoes (12%). Flood insurance has paid 1 claim here since 2022.
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 Mason Township 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
Hail
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 Mason Township’s grade
River and rain flooding is 74% of the building damage FEMA expects in Mason Township, and Mason Township’s rate of river and rain flooding damage is lower than 82% of U.S. census tracts. Next is tornadoes at 12% (higher than 66% of U.S. census tracts).
A #63 of 701 in Michigan; lower expected damage per building than 94% of U.S. towns (21,298).
All of Mason Township’s residents live in one census tract; the figures are that tract’s.
The typical Michigan town has lower expected damage than 77% of U.S. towns; within the state, Mason Township has less expected damage per building than 91% of Michigan towns.
In dollars, FEMA expects about $637K a year in losses across Mason Township: $407K to buildings, the rest to people and crops.
Does Mason Township flood? Rarely: 1 flood claim since 2022
Every paid claim on a federal flood insurance policy in Mason Township, from FEMA’s records: 1.0 per 1,000 homes, fewer than 79% of the 13,809 U.S. towns with a flood insurance record.
Mason Township isn’t in FEMA’s Community Rating System, which cuts flood insurance up to 45% in towns that do extra flood-proofing.
Insurance rates: Cass County.The storms Mason Township remembers
None of the 6 disasters declared for Cass County shows FEMA aid or repair money reaching Mason Township itself in FEMA’s records, so these are its biggest flood-claim years.
- 20221 flood claims paidNo declaration for the county that year
Cass County has had 6 natural disasters declared by the President since 1953, most often winter storms, then severe storms. Not counted: the 2005 Hurricane Katrina evacuee emergency, which covered counties that took in evacuees.
Old photos of Mason Township after a storm or flood belong in the town’s history. Add one, or share what you remember below.
Add to the Mason Township archive →Mason Township and its neighbors
Mason Township is 2nd of the 6 graded towns here, from least expected damage per building to most. Tap a town to see its hazards.
| Town | Hazard risk | Mostly (buildings) | Flood claims |
|---|---|---|---|
| Simonton Lake | A+less damage than 96% | river and rain flooding | — |
| Mason Township | Aless damage than 94% | river and rain flooding | 1 |
| Osolo Township | Aless damage than 94% | river and rain flooding | 3 |
| Ontwa Township | Aless damage than 91% | river and rain flooding | — |
| Calvin Township | Aless damage than 90% | river and rain flooding | — |
| Porter Township | Aless damage than 88% | river and rain flooding | 1 |
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 Mason Township 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.
- Park in a garage or under cover when storms are forecast.
- Stay away from windows while it falls.
- Photograph roof and car damage for your insurer.
- 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 Mason Township
Is Mason Township at risk for natural disasters?
On FEMA’s National Risk Index, Mason Township has lower expected damage per building than 94% of U.S. towns: A for hazard risk, #63 of 701 in Michigan. Most of the expected damage is river and rain flooding (74%) and tornadoes (12%). The figures are for the one census tract the town shares with its neighbors. This is FEMA’s model of an average year for today’s buildings, not a forecast.
Does Mason Township flood?
Flood insurance has paid 1 claim in Mason Township since 2022, $2K in all, or 1.0 per 1,000 homes, fewer than 79% of U.S. towns with a flood insurance record.
Is Mason Township 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 Cass County, 10% of homes in mapped flood zones carry federal flood insurance, and 0.2% of all homes do.
How much is flood insurance in Mason Township?
FEMA’s Community Rating System list shows no discount for Mason Township’s flood program. Premiums depend on the building; policies usually start 30 days after you buy, so get a quote early.
Is Mason Township at risk from river and rain flooding?
It is the largest share of the building damage FEMA expects here (74%), and Mason Township’s rate for it is lower than 82% of U.S. census tracts.
Storm stories
Memories, warnings and help from neighbors in Mason Township.
Sources: FEMA National Risk Index v1.20 (December 2025), census-tract table, combined by where Mason Township’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.