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DeerfieldWisconsin1Photo: self · CC BY-SA 2.5
AHazard risk
Natural hazards in Deerfield · FEMA

FEMA puts Deerfield’s expected hazard damage per building below that of 90% of U.S. towns, mostly from river and rain flooding

On FEMA’s National Risk Index, Deerfield gets an A for hazard risk: lower expected damage per building than 90% of U.S. towns, #110 of 362 in Wisconsin. Most of that expected damage is river and rain flooding (70%), then tornadoes (16%). FEMA’s files show no paid flood insurance claims here.

River and rain flooding 70%Tornadoes 16%Hail 12%

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 90%of U.S. townsLess damageMoreExpected yearly damage per dollar of building, vs. the 21,298 U.S. towns we grade#110 of 362 in Wisconsin
Hazard risk
A#110 of 362
in Wisconsin · lower than 90% of U.S. towns
Main hazard
River and rain flooding
70% of expected building damage
Flood claims
0
paid since 1978 · $0
Disasters paid out here
7
of 16 declared for Dane County
By hazard

What Deerfield 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

70%of expected building damage
Below average · lower than 79% of U.S. census tracts
Recorded about 2 times a year in the area

Tornadoes

16%of expected building damage
Above average · higher than 77% of U.S. census tracts
Recorded about once every 18 years in the area

Hail

12%of expected building damage
Well above average · higher than 88% of U.S. census tracts
Recorded about 4 times a year in the area
Smaller shares here
 Strong wind Earthquakes Wildfire Lightning Ice storms Hurricanes Winter storms Cold waves Heat waves Landslides
FEMA models no building damage here
Coastal floodingAvalanchesTsunamisVolcanic activity
People, not buildings.Counting harm to people as well as buildings, FEMA’s model puts cold waves at 19% of Deerfield’s expected losses. Cold 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 Deerfield’s grade

River and rain flooding is 70% of the building damage FEMA expects in Deerfield, and Deerfield’s rate of river and rain flooding damage is lower than 79% of U.S. census tracts. Next is tornadoes at 16% (higher than 77% of U.S. census tracts).

Where Deerfield sits
Deerfield
Least damageMiddleMost damage

A #110 of 362 in Wisconsin; lower expected damage per building than 90% of U.S. towns (21,298).

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

What drives the damage to buildings
River and rain flooding70%Tornadoes16%Hail12%Everything else2%

The typical Wisconsin town has lower expected damage than 79% of U.S. towns; within the state, Deerfield has less expected damage per building than 70% of Wisconsin towns.

In dollars, FEMA expects about $1.0M a year in losses across Deerfield: $625K to buildings, the rest to people and crops.

Shared tract.All of Deerfield’s 2,507 residents (2020 census) live in one census tract, which it shares with Deerfield town (1,684 residents) and Christiana town (1,235 residents) and Rockdale village (207 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 Deerfield flood? No paid flood claims on record

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

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

Insurance rates: Dane County.
Disasters

7 federal disasters brought FEMA money to Deerfield

Disasters that paid out in Deerfield itself (aid to households or repair grants to the Village of Deerfield), newest first, with that year’s flood claims.

  1. 2018Severe Storms, Tornadoes, Straight-line Winds, Flooding, and Landslides2 households applied for aid$3K aid approved
  2. 2011Severe Winter Storm and Snowstorm$4K to the Village of Deerfield for repairs
  3. 2008Severe Storms, Tornadoes, and Flooding13 households applied for aid$19K aid approved$5K to the Village of Deerfield for repairs
  4. 2008Record Snow and Near Record Snow$5K to the Village of Deerfield for repairs
  5. 2007Severe Storms and Flooding16 households applied for aid$27K aid approved
  6. 2000Snow$3K to the Village of Deerfield for repairs
Show all 7
  1. 2000Severe Storms, Tornadoes, and Flooding$4K to the Village of Deerfield for repairs
Disasters declared, by decade
Paid out in DeerfieldDane County only

Dane County has had 16 natural disasters declared by the President since 1953, most often severe storms, then winter storms. Not counted: the 2005 Hurricane Katrina evacuee emergency, which covered counties that took in evacuees.

Were you here?

Old photos of Deerfield after a storm or flood belong in the town’s history. Add one, or share what you remember below.

Add to the Deerfield archive →
Be ready

Get ready for what Deerfield 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 ↗
Tornado warnings
  • Pick your spot now: the lowest floor, an inside room, no windows.
  • A watch means be ready; a warning means take cover now.
  • Keep shoes and a flashlight by the bed.
More from Ready.gov ↗
Hail
  • Park in a garage or under cover when storms are forecast.
  • Stay away from windows while it falls.
  • Photograph roof and car damage for your insurer.
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 Deerfield

Is Deerfield at risk for natural disasters?

On FEMA’s National Risk Index, Deerfield has lower expected damage per building than 90% of U.S. towns: A for hazard risk, #110 of 362 in Wisconsin. Most of the expected damage is river and rain flooding (70%) and tornadoes (16%). 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 Deerfield 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 Dane County, 17% of homes in mapped flood zones carry federal flood insurance, and 0.4% of all homes do.

How much is flood insurance in Deerfield?

FEMA’s Community Rating System list shows no discount for Deerfield’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 Deerfield?

By FEMA money that reached Deerfield, Severe Storms and Flooding (2007): 16 households applied for aid, $27K approved.

Is Deerfield at risk from river and rain flooding?

It is the largest share of the building damage FEMA expects here (70%), and Deerfield’s rate for it is lower than 79% of U.S. census tracts.

Storm stories

Memories, warnings and help from neighbors in Deerfield.

Town Square →
Start the conversation

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