Photo: Tim Pierce · CC BY 3.0On FEMA’s figures, Stow faces less hazard damage per building than 83% of U.S. towns, mostly from river and rain flooding
On FEMA’s National Risk Index, Stow gets an A− for hazard risk: lower expected damage per building than 83% of U.S. towns, #99 of 283 in Massachusetts. Most of that expected damage is river and rain flooding (78%), then hurricanes (10%). 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 Stow 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
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 Stow’s grade
River and rain flooding is 78% of the building damage FEMA expects in Stow, and Stow’s rate of river and rain flooding damage is lower than 66% of U.S. census tracts. Ice storms add 3%, at a rate in the top 8% of U.S. census tracts.
A− #99 of 283 in Massachusetts; lower expected damage per building than 83% of U.S. towns (21,298).
Stow’s residents live in 2 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, Stow has less expected damage per building than 65% of Massachusetts towns.
In dollars, FEMA expects about $2.0M a year in losses across Stow: $1.7M to buildings, the rest to people and crops.
Does Stow flood? No paid flood claims on record
FEMA’s records show no paid flood insurance claims in Stow. That’s not a promise: most homes don’t carry flood insurance, so small floods go unrecorded.
Stow isn’t in FEMA’s Community Rating System, which cuts flood insurance up to 45% in towns that do extra flood-proofing.
Insurance rates: Middlesex County.13 federal disasters brought FEMA money to Stow
Disasters that paid out in Stow itself (aid to households or repair grants to the Town of Stow), newest first, with that year’s flood claims.
- 2018Severe Winter Storm and Snowstorm$25K to the Town of Stow for repairs
- 2015Severe Winter Storm, Snowstorm, and Flooding$38K to the Town of Stow for repairs
- 2013Severe Winter Storm, Snowstorm, and Flooding$19K to the Town of Stow for repairs
- 2011Severe Storm and Snowstorm$34K to the Town of Stow for repairs
- 2011Hurricane Irene$8K to the Town of Stow for repairs
- 2011Severe Winter Storm and Snowstorm$24K to the Town of Stow for repairs
Show all 13
- 2010Severe Storms and Flooding26 households applied for aid$49K aid approved$13K to the Town of Stow for repairs
- 2008Severe Winter Storm and Flooding$15K to the Town of Stow for repairs
- 2005Record And/or Near Record Snow$23K to the Town of Stow for repairs
- 2004Flooding1 households applied for aid$5K aid approved
- 2003Snow$14K to the Town of Stow for repairs
- 2003Snow$12K to the Town of Stow for repairs
- 2001Snow$13K to the Town of Stow for repairs
Middlesex County has had 27 natural disasters declared by the President since 1953, most often winter storms, then hurricanes and tropical storms. Not counted: the 2005 Hurricane Katrina evacuee emergency, which covered counties that took in evacuees.
Old photos of Stow after a storm or flood belong in the town’s history. Add one, or share what you remember below.
Add to the Stow archive →Stow and its neighbors
Stow is 5th 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 |
|---|---|---|---|
| Boxborough | Aless damage than 94% | river and rain flooding | — |
| Sudbury | Aless damage than 93% | river and rain flooding | 17 |
| Acton | A−less damage than 84% | river and rain flooding | 35 |
| Hudson | A−less damage than 84% | river and rain flooding | 9 |
| Stow | A−less damage than 83% | river and rain flooding | 0 |
| Maynard | B+less damage than 74% | river and rain flooding | 7 |
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 Stow 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.
- 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 Stow
Is Stow at risk for natural disasters?
On FEMA’s National Risk Index, Stow has lower expected damage per building than 83% of U.S. towns: A− for hazard risk, #99 of 283 in Massachusetts. Most of the expected damage is river and rain flooding (78%) and hurricanes (10%). This is FEMA’s model of an average year for today’s buildings, not a forecast.
Is Stow 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 Middlesex County, 54% of homes in mapped flood zones carry federal flood insurance, and 1.0% of all homes do.
How much is flood insurance in Stow?
FEMA’s Community Rating System list shows no discount for Stow’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 Stow?
By FEMA money that reached Stow, Severe Storms and Flooding (2010): 26 households applied for aid, $49K approved, and $13K to the Town of Stow for repairs.
Is Stow at risk from river and rain flooding?
It is the largest share of the building damage FEMA expects here (78%), and Stow’s rate for it is lower than 66% of U.S. census tracts.
Storm stories
Memories, warnings and help from neighbors in Stow.
Sources: FEMA National Risk Index v1.20 (December 2025), census-tract table, combined by where Stow’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.