Natural hazards · Mequon

Mequon, WI natural hazards

Most of the natural-hazard damage FEMA expects in Mequon comes from inland flooding, and overall the risk is low for a U.S. community. Flood insurance has paid 128 claims here since 1979. 3 federal disasters brought FEMA money into town.

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

Expected damage

How exposed is Mequon?

Low

vs. U.S. communities

FEMA expects yearly storm and flood damage to homes and buildings in Mequon to be higher than in 25% of U.S. communities, mostly from inland flooding and cold waves.

Inland flooding58%Cold waves23%Tornadoes10%Everything else10%

By hazard

What Mequon 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

Below average · higher than 49% of U.S. places

Recorded about once a year in the area

Cold waves

23% of expected damage

Below average · higher than 31% of U.S. places

Recorded about 5 times a year in the area

Tornadoes

10% of expected damage

Above average · higher than 58% of U.S. places

Lower here

Coastal floodingHurricanesHailIce stormsWinter weatherHeat wavesWildfireEarthquakesLandslidesStrong windLightningDrought

Not a risk here

AvalanchesTsunamisVolcanic 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 Mequon flood?

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

128paid claims since 1979

$1.8Mpaid to owners

16homes flooded more than once

19792026

Biggest named events

Storm: 37 claims, $880K
2025-08-MilwaukeeMetro-Flood: 17 claims, $366K
March 2019 Midwest Flooding: 6 claims, $85K

Homes that flooded again and again

■ FEMA “severe repetitive loss” (2) ■ flooded 2+ times

of homes in flood zones
are insured

of all homes
are insured

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

Insurance rates: Ozaukee County.

Disasters that hit Mequon

3 federal disasters brought FEMA money here

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

Brought FEMA money into MequonDeclared for Ozaukee County only

2008

Severe Storms, Tornadoes, and Flooding

97 households applied for aid $193K aid approved $445K to the City of Mequon for repairs

2004

Severe Storms and Flooding

21 households applied for aid $41K aid approved $20K to the City of Mequon for repairs

2000

Snow

$37K to the City of Mequon for repairs

Ozaukee County has had 11 natural disasters declared since 1953, most often floods and severe storms.

Around Mequon

Mequon and the towns around it

Very lowLowModerateHighVery high

Mequonmostly inland floodingLow

Milwaukeemostly cold wavesLow

Cedarburgmostly inland floodingLow

Cedarburgmostly inland floodingVery low

Baysidemostly cold wavesVery 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. Mequon covers 5 census tracts, combined by population.

Money that reached townFlood claims are matched to Mequon’s own flood-insurance community; household aid to the registrant’s city; repair grants to the City of Mequon. 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 Mequon total about $10.8M 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.