Natural hazards · Lake Delton

Lake Delton, WI natural hazards

Most of the natural-hazard damage FEMA expects in Lake Delton comes from inland flooding, and overall the risk is low for a U.S. community. 5 federal disasters brought FEMA money into town.

FEMA National Risk Index, December 2025 · OpenFEMA claims, aid & declarations

Expected damage

How exposed is Lake Delton?

Low

vs. U.S. communities

FEMA expects yearly storm and flood damage to homes and buildings in Lake Delton to be higher than in 39% of U.S. communities, mostly from inland flooding.

Inland flooding58%Tornadoes14%Cold waves14%Hail9%Everything else5%

By hazard

What Lake Delton faces

Each hazard’s share of the damage FEMA expects here, and how that compares with the rest of the country.

Inland flooding

58% of expected damage

Above average · higher than 54% of U.S. places

Recorded about 2 times a year in the area

Tornadoes

14% of expected damage

Well above average · higher than 80% of U.S. places

Cold waves

14% of expected damage

Below average · higher than 35% of U.S. places

Recorded about 6 times a year in the area

Hail

9% of expected damage

Well above average · higher than 92% of U.S. places

Recorded about 3 times a year in the area

Lower here

HurricanesIce stormsWinter weatherHeat wavesWildfireEarthquakesLandslidesStrong windLightningDrought

Not a risk here

Coastal floodingAvalanchesTsunamisVolcanic activity

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

Flood insurance claims

Does Lake Delton flood?

FEMA's records show no paid flood insurance claims in Lake Delton.

of homes in flood zones
are insured

of all homes
are insured

No community discount. Lake Delton isn’t in FEMA’s Community Rating System, which cuts flood insurance up to 45% in towns that do extra flood-proofing.

Insurance rates: Sauk County.

Disasters that hit Lake Delton

5 federal disasters brought FEMA money here

Disasters the President declared that paid out in Lake Delton itself: aid to households, or repair grants to the Village of Lake Delton.

Brought FEMA money into Lake DeltonDeclared for Sauk County only

2018

Severe Storms, Tornadoes, Straight-Line Winds, Flooding, and Landslides

$170K to the Village of Lake Delton for repairs

2008

Severe Storms, Tornadoes, and Flooding

25 households applied for aid $39K aid approved $802K to the Village of Lake Delton for repairs

2007

Severe Storms and Flooding

1 household applied for aid $723 aid approved

2004

Severe Storms and Flooding

2 households applied for aid $2K aid approved

2000

Severe Storms, Tornadoes, and Flooding

$9K to the Village of Lake Delton for repairs

Sauk County has had 13 natural disasters declared since 1953, most often severe storms and floods.

Around Lake Delton

Lake Delton and the towns around it

Very lowLowModerateHighVery high

Deltonmostly inland floodingModerate

Lake Deltonmostly inland floodingLow

Wisconsin Dellsmostly inland floodingLow

About these numbers

How to read this page

An average, not a forecastFEMA’s National Risk Index estimates the damage 18 kinds of natural hazards cause in a typical year, from decades of records and models. A quiet decade can follow a bad year.

Compared by rate“Higher than N%” compares yearly damage as a share of what’s here, so a big city isn’t rated riskier just for having more buildings. Lake Delton is smaller than a census tract, so it shares the figures of the tract around its center.

Money that reached townFlood claims are matched to Lake Delton’s own flood-insurance community; household aid to the registrant’s city; repair grants to the Village of Lake Delton. FEMA’s model follows property values, so a place that recently lost many homes can rate lower than it feels.

Sources: FEMA National Risk Index (December 2025); 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. Census tracts: U.S. Census Bureau.