Photo: John Phelan · CC BY-SA 4.0On FEMA’s figures, Deep River faces more hazard damage per building than 66% of U.S. towns, mostly from river and rain flooding
On FEMA’s National Risk Index, Deep River gets a C for hazard risk: higher expected damage per building than 66% of U.S. towns, #92 of 155 in Connecticut. Most of that expected damage is river and rain flooding (84%), then hurricanes (10%). Flood insurance has paid 12 claims here since 1982.
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 Deep River 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 Deep River’s grade
River and rain flooding is 84% of the building damage FEMA expects in Deep River, and Deep River’s rate of river and rain flooding damage is higher than 78% of U.S. census tracts. Coastal flooding adds 2%, at a rate in the top 5% of U.S. census tracts.
C #92 of 155 in Connecticut; higher expected damage per building than 66% of U.S. towns (21,298).
All of Deep River’s residents live in one census tract; the figures are that tract’s.
The typical Connecticut town has higher expected damage than 62% of U.S. towns; within the state, Deep River has more expected damage per building than 59% of Connecticut towns.
In dollars, FEMA expects about $1.5M a year in losses across Deep River: $1.5M to buildings, the rest to people and crops.
Does Deep River flood? Sometimes: 12 flood claims since 1982
Every paid claim on a federal flood insurance policy in Deep River, from FEMA’s records: 5.7 per 1,000 homes, more than 63% of the 13,809 U.S. towns with a flood insurance record.
- Hurricane Sandy2 claims · $59K
- The March 2010 nor’easter2 claims · $7K
- Hurricane Irene1 claim · $16K
Deep River isn’t in FEMA’s Community Rating System, which cuts flood insurance up to 45% in towns that do extra flood-proofing.
Insurance rates: the county.7 federal disasters brought FEMA money to Deep River
Disasters that paid out in Deep River itself (aid to households or repair grants to the Town of Deep River), newest first, with that year’s flood claims.
- 2020Tropical Storm Isaias$107K to the Town of Deep River for repairs
- 2018Severe Storms and Flooding$18K to the Town of Deep River for repairs
- 2013Severe Winter Storm and Snowstorm$38K to the Town of Deep River for repairs
- 2012Hurricane Sandy$69K to the Town of Deep River for repairs2 flood claims paid for it, $59K
- 2011Tropical Storm Irene$57K to the Town of Deep River for repairs1 flood claim paid for it, $16K
- 2005Record Snow$11K to the Town of Deep River for repairs
Show all 7
- 2003Snow$6K to the Town of Deep River for repairs
Old photos of Deep River after a storm or flood belong in the town’s history. Add one, or share what you remember below.
Add to the Deep River archive →Deep River and its neighbors
Deep River is 3rd of the 5 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 |
|---|---|---|---|
| Westbrook | C+more damage than 55% | river and rain flooding | 398 |
| Essex | C+more damage than 59% | river and rain flooding | 63 |
| Deep River | Cmore damage than 66% | river and rain flooding | 12 |
| Chester | Cmore damage than 71% | river and rain flooding | 34 |
| Lyme | Cmore damage than 73% | river and rain flooding | 21 |
| Deep River Center | — | a Census area inside a town; graded with the town | |
| Chester Center | — | a Census area inside a town; graded with the town | |
| Essex Village | — | a Census area inside a town; graded with the town | |
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 Deep River 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 Deep River
Is Deep River at risk for natural disasters?
On FEMA’s National Risk Index, Deep River has higher expected damage per building than 66% of U.S. towns: C for hazard risk, #92 of 155 in Connecticut. Most of the expected damage is river and rain flooding (84%) and hurricanes (10%). 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 Deep River flood?
Flood insurance has paid 12 claims in Deep River since 1982, $141K in all, or 5.7 per 1,000 homes, more than 63% of U.S. towns with a flood insurance record. 1 properties have flooded more than once. The most claims came from Hurricane Sandy (2).
Is Deep River 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 the county, 42% of homes in mapped flood zones carry federal flood insurance, and 4.1% of all homes do.
How much is flood insurance in Deep River?
FEMA’s Community Rating System list shows no discount for Deep River’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 Deep River?
By FEMA money that reached Deep River, Tropical Storm Isaias (2020): $107K to the Town of Deep River for repairs. By flood claims, Hurricane Sandy: 2 paid, $59K.
Is Deep River at risk from river and rain flooding?
It is the largest share of the building damage FEMA expects here (84%), and Deep River’s rate for it is higher than 78% of U.S. census tracts.
Storm stories
Memories, warnings and help from neighbors in Deep River.
Sources: FEMA National Risk Index v1.20 (December 2025), census-tract table, combined by where Deep River’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.