Great Blue Hill Weather Observatory · Photo: Jameslwoodward · CC BY-SA 3.0Less hazard damage per building is expected in Canton than in 90% of U.S. towns, mostly from river and rain flooding
On FEMA’s National Risk Index, Canton gets an A for hazard risk: lower expected damage per building than 90% of U.S. towns, #48 of 283 in Massachusetts. Most of that expected damage is river and rain flooding (76%), then hurricanes (14%). Flood insurance has paid 26 claims here since 1978.
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 Canton’s natural hazards
From FEMA’s model and FEMA’s records, below.
What Canton 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
Hurricanes
Earthquakes
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 Canton’s grade
River and rain flooding is 76% of the building damage FEMA expects in Canton, and Canton’s rate of river and rain flooding damage is lower than 74% of U.S. census tracts. Next is hurricanes at 14% (higher than 79% of U.S. census tracts).
A #48 of 283 in Massachusetts; lower expected damage per building than 90% of U.S. towns (21,298).
Canton’s residents live in 6 census tracts; FEMA’s figures are combined by where they live.
The typical Massachusetts town has lower expected damage than 76% of U.S. towns; within the state, Canton has less expected damage per building than 83% of Massachusetts towns.
In dollars, FEMA expects about $5.3M a year in losses across Canton: $4.9M to buildings, the rest to people and crops.
Does Canton flood? Sometimes: 26 flood claims since 1978
Every paid claim on a federal flood insurance policy in Canton, from FEMA’s records: 2.6 per 1,000 homes, fewer than 55% of the 13,809 U.S. towns with a flood insurance record.
- The March 2010 nor’easter4 claims · $33K
Canton isn’t in FEMA’s Community Rating System, which cuts flood insurance up to 45% in towns that do extra flood-proofing.
Insurance rates: Norfolk County.14 federal disasters brought FEMA money to Canton
Disasters that paid out in Canton itself (aid to households or repair grants to the Town of Canton), newest first, with that year’s flood claims.
- 2022Severe Winter Storm and Snowstorm$178K to the Town of Canton for repairs
- 2018Severe Winter Storm and Snowstorm$121K to the Town of Canton for repairs
- 2018Severe Winter Storm and Flooding$23K to the Town of Canton for repairs
- 2015Severe Winter Storm, Snowstorm, and Flooding$975K to the Town of Canton for repairs
- 2013Severe Winter Storm, Snowstorm, and Flooding$191K to the Town of Canton for repairs1 flood claim paid that year
- 2011Tropical Storm Irene$100K to the Town of Canton for repairs
Show all 14
- 2011Severe Winter Storm and Snowstorm$124K to the Town of Canton for repairs
- 2010Severe Storms and Flooding254 households applied for aid$374K aid approved$184K to the Town of Canton for repairs4 flood claims paid that year
- 2005Severe Storms and Flooding1 households applied for aid$4K aid approved
- 2005Record And/or Near Record Snow$109K to the Town of Canton for repairs
- 2004Flooding3 households applied for aid$3K aid approved
- 2003Snow$121K to the Town of Canton for repairs
- 2003Snow$67K to the Town of Canton for repairs
- 2001Snow$77K to the Town of Canton for repairs
Norfolk County has had 29 natural disasters declared by the President since 1953, most often hurricanes and tropical storms, then winter storms. Not counted: the 2005 Hurricane Katrina evacuee emergency, which covered counties that took in evacuees.
Old photos of Canton after a storm or flood belong in the town’s history. Add one, or share what you remember below.
Add to the Canton archive →Canton and its neighbors
Canton is 4th 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 |
|---|---|---|---|
| Sharon | A+less damage than 96% | river and rain flooding | 26 |
| Stoughton | A+less damage than 95% | river and rain flooding | 25 |
| Westwood | Aless damage than 95% | river and rain flooding | 27 |
| Canton | Aless damage than 90% | river and rain flooding | 26 |
| Norwood | Aless damage than 89% | river and rain flooding | 23 |
| Dedham | Aless damage than 87% | river and rain flooding | 30 |
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 Canton 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.
- The season runs June through November and peaks from mid-August to mid-October.
- Bring in porch furniture and anything the wind can throw.
- Fill the gas tank and charge phones before the storm arrives.
- Drop, cover and hold on.
- Strap tall furniture and the water heater to the wall.
- Know how to shut off the gas.
- 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 Canton
Is Canton at risk for natural disasters?
On FEMA’s National Risk Index, Canton has lower expected damage per building than 90% of U.S. towns: A for hazard risk, #48 of 283 in Massachusetts. Most of the expected damage is river and rain flooding (76%) and hurricanes (14%). This is FEMA’s model of an average year for today’s buildings, not a forecast.
Does Canton flood?
Flood insurance has paid 26 claims in Canton since 1978, $143K in all, or 2.6 per 1,000 homes, fewer than 55% of U.S. towns with a flood insurance record. 2 properties have flooded more than once. The most claims came from March 2010 Nor'easter (4).
Is Canton 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 Norfolk County, 43% of homes in mapped flood zones carry federal flood insurance, and 1.5% of all homes do.
How much is flood insurance in Canton?
FEMA’s Community Rating System list shows no discount for Canton’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 Canton?
By FEMA money that reached Canton, Severe Winter Storm, Snowstorm, and Flooding (2015): $975K to the Town of Canton for repairs. By flood claims, March 2010 Nor'easter: 4 paid, $33K.
Is Canton at risk from river and rain flooding?
It is the largest share of the building damage FEMA expects here (76%), and Canton’s rate for it is lower than 74% of U.S. census tracts.
Storm stories
Memories, warnings and help from neighbors in Canton.
Sources: FEMA National Risk Index v1.20 (December 2025), census-tract table, combined by where Canton’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.