Natural hazards · Mazon

Mazon, IL natural hazards

Most of the natural-hazard damage FEMA expects in Mazon comes from inland flooding, and overall the risk is high for a U.S. community. Flood insurance has paid 7 claims here since 1990. 3 federal disasters brought FEMA money into town.

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

How exposed is Mazon?

79
High
vs. U.S. communities

FEMA expects yearly storm and flood damage to homes and buildings in Mazon to be higher than in 79% of U.S. communities, mostly from inland flooding and cold waves.

Inland flooding60%Cold waves27%Tornadoes8%Everything else6%
By hazard

What Mazon faces

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

Inland flooding

60% of expected damage
Well above average · higher than 92% of U.S. places
Recorded about once a year in the area

Cold waves

27% of expected damage
Well below average · higher than 18% of U.S. places
Recorded about 5 times a year in the area

Tornadoes

8% of expected damage
Well above average · higher than 86% of U.S. places
Recorded about once every 7 years in the area

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 Mazon flood?

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

7paid claims since 1990
$70Kpaid to owners
1homes flooded more than once
19902026

Biggest named events

  • Mid-spring storms: 4 claims, $56K

Homes that flooded again and again

■ FEMA “severe repetitive loss” (0) ■ flooded 2+ times

of homes in flood zones
are insured
of all homes
are insured
No community discount. Mazon isn’t in FEMA’s Community Rating System, which cuts flood insurance up to 45% in towns that do extra flood-proofing.
Insurance rates: Grundy County.
Disasters that hit Mazon

3 federal disasters brought FEMA money here

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

Brought FEMA money into MazonDeclared for Grundy County only
2013

Severe Storms, Straight-Line Winds, and Flooding

14 households applied for aid $13K aid approved
2008

Severe Storms and Flooding

12 households applied for aid $24K aid approved
2007

Severe Storms and Flooding

1 household applied for aid $1K aid approved
Grundy County has had 13 natural disasters declared since 1953, most often floods and winter storms.
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. Mazon 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 Mazon’s own flood-insurance community; household aid to the registrant’s city; repair grants to the Village of Mazon. 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.

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Boundary source: https://tigerweb.geo.census.gov/arcgis/rest/services/TIGERweb/Places_CouSub_ConCity_SubMCD/MapServer/18 · 2025-01-01