Natural hazards · Lannon

Lannon, WI natural hazards

Most of the natural-hazard damage FEMA expects in Lannon comes from inland flooding, and overall the risk is low for a U.S. community. Flood insurance has paid 2 claims here since 1979. 4 federal disasters brought FEMA money into town.

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

Expected damage

How exposed is Lannon?

Low

vs. U.S. communities

FEMA expects yearly storm and flood damage to homes and buildings in Lannon to be higher than in 21% of U.S. communities, mostly from inland flooding and cold waves.

Inland flooding45%Cold waves25%Tornadoes19%Everything else11%

By hazard

What Lannon faces

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

Inland flooding

45% of expected damage

Below average · higher than 38% of U.S. places

Recorded about 2 times a year in the area

Cold waves

25% of expected damage

Below average · higher than 33% of U.S. places

Recorded about 5 times a year in the area

Tornadoes

19% of expected damage

Above average · higher than 73% of U.S. places

Lower here

HurricanesHailIce 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 Lannon flood?

Every paid claim on a federal flood insurance policy in Lannon, from FEMA’s records.

2paid claims since 1979

$2Kpaid to owners

0homes flooded more than once

19792026

of homes in flood zones
are insured

of all homes
are insured

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

Insurance rates: Waukesha County.

Disasters that hit Lannon

4 federal disasters brought FEMA money here

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

Brought FEMA money into LannonDeclared for Waukesha County only

2026

Severe Storms, Tornadoes, and Flooding

5 households applied for aid $2K aid approved

2025

Severe Storms, Straight-Line Winds, Flooding, and Mudslides

6 households applied for aid $22K aid approved

2008

Severe Storms, Tornadoes, and Flooding

4 households applied for aid $10K aid approved

2000

Snow

$956 to the Village of Lannon for repairs

Waukesha County has had 17 natural disasters declared since 1953, most often floods and severe storms.

Around Lannon

Lannon and the towns around it

Very lowLowModerateHighVery high

Lannonmostly inland floodingLow

Menomonee Fallsmostly inland floodingVery low

Lisbonmostly inland floodingVery low

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. Lannon covers 1 census tract, combined by population.

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

FEMA’s expected losses across Lannon total about $1.6M a year, counting buildings, people and crops.

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.