Guest, Sign inJoin

Post to Manhattan

We’ll email a one-tap link to publish your post. No password, and nothing is public until you click it.
Already a member? Sign in
Dry Creek SchoolDry Creek School · Photo: Jackie59715 · CC BY-SA 4.0
BHazard risk
Natural hazards in Manhattan · FEMA

FEMA expects about as much hazard damage per building in Manhattan as in the typical U.S. town, mostly from river and rain flooding

On FEMA’s National Risk Index, Manhattan gets a B for hazard risk: lower expected damage per building than 55% of U.S. towns. Most of that expected damage is river and rain flooding (50%), then earthquakes (43%). FEMA’s files show no paid flood insurance claims here.

River and rain flooding 50%Earthquakes 43%Hail 5%

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

less than 55%of U.S. townsLess damageMoreExpected yearly damage per dollar of building, vs. the 21,298 U.S. towns we grade
Hazard risk
B
in Montana · lower than 55% of U.S. towns
Main hazard
River and rain flooding
50% of expected building damage
Flood claims
0
paid since 1978 · $0
Disasters paid out here
0
of 4 declared for Gallatin County
By hazard

What Manhattan 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

50%of expected building damage
Below average · lower than 71% of U.S. census tracts
Recorded about once every 2 years in the area

Earthquakes

43%of expected building damage
Well above average · higher than 85% of U.S. census tracts
Smaller shares here
 Hail Wildfire Tornadoes Strong wind Winter storms Ice storms Cold waves Heat waves Landslides Lightning
FEMA models no building damage here
Coastal floodingHurricanesAvalanchesTsunamisVolcanic activity
People, not buildings.Counting harm to people as well as buildings, FEMA’s model puts cold waves at 25% of Manhattan’s expected losses. Cold waves do little damage to buildings (0.1%), so they aren’t part of the grade.

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.

Flood risk changes street by street. Check a specific address on FEMA’s flood map, and ask about flood insurance before you buy.
Hazard risk grade

What’s behind Manhattan’s grade

River and rain flooding is 50% of the building damage FEMA expects in Manhattan, and Manhattan’s rate of river and rain flooding damage is lower than 71% of U.S. census tracts. Next is earthquakes at 43% (higher than 85% of U.S. census tracts).

Where Manhattan sits
Manhattan
Least damageMiddleMost damage

B lower expected damage per building than 55% of U.S. towns (21,298).

All of Manhattan’s residents live in one census tract; the figures are that tract’s.

What drives the damage to buildings
River and rain flooding50%Earthquakes43%Hail5%Everything else3%

In dollars, FEMA expects about $1.1M a year in losses across Manhattan: $617K to buildings, the rest to people and crops.

Shared tract.All of Manhattan’s 2,086 residents (2020 census) live in one census tract, which it shares with Churchill CDP (1,030 residents) and Amsterdam CDP (206 residents) and Logan CDP (72 residents). FEMA publishes its model by tract, so the rate and the hazard mix are the tract’s, the same for all of them. The flood claims below are the town’s own.
A shared figure. The grade describes the whole tract, not each street in it, and FEMA’s model is an average year for today’s buildings, not a record: the claims below are the record.

How TownRatings grades hazard risk →

Flood insurance claims

Does Manhattan flood? No paid flood claims on record

FEMA’s records show no paid flood insurance claims in Manhattan. That’s not a promise: most homes don’t carry flood insurance, so small floods go unrecorded.

of homes in flood zones are insured
of all homes are insured
No community discount

Manhattan isn’t in FEMA’s Community Rating System, which cuts flood insurance up to 45% in towns that do extra flood-proofing.

Insurance rates: Gallatin County.
Disasters

The storms Manhattan remembers

None of the 4 disasters declared for Gallatin County shows FEMA aid or repair money reaching Manhattan itself in FEMA’s records, so these are its biggest flood-claim years.

Disasters declared, by decade
Paid out in ManhattanGallatin County only

Gallatin County has had 4 natural disasters declared by the President since 1953, most often severe storms, then floods. Not counted: the 2005 Hurricane Katrina evacuee emergency, which covered counties that took in evacuees.

Also 2 FEMA wildfire suppression grants (Fire Management Assistance, not a disaster declaration) for fires in Gallatin County, 2000–2020.

Be ready

Get ready for what Manhattan faces

A short kit for the hazards that drive the building damage here, what to check before you buy, and where neighbors get alerts.

When the river rises
  • 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.
More from Ready.gov ↗
Earthquakes
  • Drop, cover and hold on.
  • Strap tall furniture and the water heater to the wall.
  • Know how to shut off the gas.
More from Ready.gov ↗
Before you buy or rent
  • 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.
When a storm is coming
Forecast and alertsWeather →911, the nearest ERSafety →

Know where neighbors sign up for alerts? Add it to the Handbook so everyone has it.

Questions about natural hazards in Manhattan

Is Manhattan at risk for natural disasters?

On FEMA’s National Risk Index, Manhattan has lower expected damage per building than 55% of U.S. towns: B for hazard risk. Most of the expected damage is river and rain flooding (50%) and earthquakes (43%). 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.

Is Manhattan 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 Gallatin County, 20% of homes in mapped flood zones carry federal flood insurance, and 0.8% of all homes do.

How much is flood insurance in Manhattan?

FEMA’s Community Rating System list shows no discount for Manhattan’s flood program. Premiums depend on the building; policies usually start 30 days after you buy, so get a quote early.

Is Manhattan at risk from river and rain flooding?

It is the largest share of the building damage FEMA expects here (50%), and Manhattan’s rate for it is lower than 71% of U.S. census tracts.

Storm stories

Memories, warnings and help from neighbors in Manhattan.

Town Square →
Start the conversation

Sources: FEMA National Risk Index v1.20 (December 2025), census-tract table, combined by where Manhattan’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.