Natural hazards · Aztalan

Aztalan, WI natural hazards

Most of the natural-hazard damage FEMA expects in Aztalan comes from inland flooding, and overall the risk is low for a U.S. community. 3 federal disasters brought FEMA money into town.

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

Expected damage

How exposed is Aztalan?

Low

vs. U.S. communities

FEMA expects yearly storm and flood damage to homes and buildings in Aztalan to be higher than in 38% of U.S. communities, mostly from inland flooding and tornadoes.

Inland flooding54%Tornadoes16%Cold waves15%Hail7%Everything else9%

By hazard

What Aztalan faces

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

Inland flooding

54% of expected damage

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

Recorded about 2 times a year in the area

Tornadoes

16% of expected damage

Well above average · higher than 83% of U.S. places

Recorded about once every 29 years in the area

Cold waves

15% of expected damage

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

Recorded about 5 times a year in the area

Hail

7% of expected damage

Well above average · higher than 89% of U.S. places

Recorded about 4 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 Aztalan flood?

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

of homes in flood zones
are insured

of all homes
are insured

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

Insurance rates: Jefferson County.

Disasters that hit Aztalan

3 federal disasters brought FEMA money here

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

Brought FEMA money into AztalanDeclared for Jefferson County only

2008

Severe Storms, Tornadoes, and Flooding

$33K to the Town of Aztalan for repairs

2008

Record Snow and Near Record Snow

$5K to the Town of Aztalan for repairs

2004

Severe Storms and Flooding

$7K to the Town of Aztalan for repairs

Jefferson County has had 12 natural disasters declared since 1953, most often severe storms and floods.

Around Aztalan

Aztalan and the towns around it

Very lowLowModerateHighVery high

Jeffersonmostly inland floodingHigh

Aztalanmostly inland floodingLow

Johnson Creekmostly inland floodingLow

Farmingtonmostly inland floodingLow

Milfordmostly inland floodingLow

Jeffersonmostly inland floodingLow

Lake Millsmostly inland floodingLow

Lake Millsmostly 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. Aztalan 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 Aztalan’s own flood-insurance community; household aid to the registrant’s city; repair grants to the Town of Aztalan. 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.