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Charles C. Vineyard HouseCharles C. Vineyard House · Photo: 25or6to4 · CC BY-SA 4.0
AHazard risk
Natural hazards in Hansen · FEMA

FEMA puts Hansen’s expected hazard damage per building below that of 92% of U.S. towns, mostly from river and rain flooding

On FEMA’s National Risk Index, Hansen gets an A for hazard risk: lower expected damage per building than 92% of U.S. towns. Most of that expected damage is river and rain flooding (84%). FEMA’s files show no paid flood insurance claims here.

River and rain flooding 84%Earthquakes 9%Wildfire 4%

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 92%of U.S. townsLess damageMoreExpected yearly damage per dollar of building, vs. the 21,298 U.S. towns we grade
Hazard risk
A
in Idaho · lower than 92% of U.S. towns
Main hazard
River and rain flooding
84% of expected building damage
Flood claims
0
paid since 1978 · $0
Disasters paid out here
0
of 1 declared for Twin Falls County
By hazard

What Hansen 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

84%of expected building damage
Below average · lower than 71% of U.S. census tracts
Recorded about once every 3 years in the area

Earthquakes

9%of expected building damage
Above average · higher than 66% of U.S. census tracts
Smaller shares here
 Wildfire Strong wind Tornadoes Hail Winter storms Lightning Ice storms Cold waves Heat waves Landslides Volcanic activity top 4%
FEMA models no building damage here
Coastal floodingHurricanesAvalanchesTsunamis
People, not buildings.Counting harm to people as well as buildings, FEMA’s model puts heat waves at 14% of Hansen’s expected losses. Heat waves do little damage to buildings (0.0%), 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 Hansen’s grade

River and rain flooding is 84% of the building damage FEMA expects in Hansen, and Hansen’s rate of river and rain flooding damage is lower than 71% of U.S. census tracts. Next is earthquakes at 9% (higher than 66% of U.S. census tracts).

Where Hansen sits
Hansen
Least damageMiddleMost damage

A lower expected damage per building than 92% of U.S. towns (21,298).

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

What drives the damage to buildings
River and rain flooding84%Earthquakes9%Wildfire4%Everything else3%

In dollars, FEMA expects about $174K a year in losses across Hansen: $117K to buildings, the rest to people and crops.

Shared tract.All of Hansen’s 1,086 residents (2020 census) live in one census tract. FEMA publishes its model by tract, so the rate and the hazard mix are the tract’s. 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 Hansen flood? No paid flood claims on record

FEMA’s records show no paid flood insurance claims in Hansen. 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

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

Insurance rates: Twin Falls County.
Disasters

The storms Hansen remembers

None of the 1 disasters declared for Twin Falls County shows FEMA aid or repair money reaching Hansen itself in FEMA’s records, so these are its biggest flood-claim years.

Disasters declared, by decade
Paid out in HansenTwin Falls County only

Twin Falls County has had 1 natural disasters declared by the President since 1953, most often floods. Not counted: the 2005 Hurricane Katrina evacuee emergency, which covered counties that took in evacuees.

Be ready

Get ready for what Hansen 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 Hansen

Is Hansen at risk for natural disasters?

On FEMA’s National Risk Index, Hansen has lower expected damage per building than 92% of U.S. towns: A for hazard risk. Most of the expected damage is river and rain flooding (84%) and earthquakes (9%). 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 Hansen 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 Twin Falls County, 21% of homes in mapped flood zones carry federal flood insurance, and 0.2% of all homes do.

How much is flood insurance in Hansen?

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

Is Hansen at risk from river and rain flooding?

It is the largest share of the building damage FEMA expects here (84%), and Hansen’s rate for it is lower than 71% of U.S. census tracts.

Storm stories

Memories, warnings and help from neighbors in Hansen.

Town Square →
Start the conversation

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