Natural hazards · Lemont

Lemont, IL natural hazards

Most of the natural-hazard damage FEMA expects in Lemont comes from inland flooding, and overall the risk is low for a U.S. community. Flood insurance has paid 7 claims here since 1979.

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

Expected damage

How exposed is Lemont?

Low

vs. U.S. communities

FEMA expects yearly storm and flood damage to homes and buildings in Lemont to be higher than in 29% of U.S. communities, mostly from inland flooding and cold waves.

Inland flooding46%Cold waves26%Tornadoes17%Heat waves8%Everything else4%

By hazard

What Lemont faces

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

Inland flooding

46% of expected damage

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

Recorded about 6 times a year in the area

Cold waves

26% of expected damage

Well below average · higher than 22% of U.S. places

Recorded about 4 times a year in the area

Tornadoes

17% of expected damage

Well above average · higher than 81% of U.S. places

Heat waves

8% of expected damage

Well above average · higher than 79% of U.S. places

Recorded about 3 times a year in the area

Lower here

HurricanesHailIce stormsWinter weatherWildfireEarthquakesLandslidesStrong 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 Lemont flood?

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

7paid claims since 1979

$55Kpaid to owners

0homes flooded more than once

19792026

of homes in flood zones
are insured

of all homes
are insured

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

Insurance rates: Cook County.

Disasters that hit Lemont

Federal disasters declared here

None of the disasters declared for Cook County shows FEMA aid or repair money reaching Lemont itself in FEMA’s records.

Brought FEMA money into LemontDeclared for Cook County only

Cook County has had 21 natural disasters declared since 1953, most often floods and severe storms.

Around Lemont

Lemont and the towns around it

Very lowLowModerateHighVery high

Palosmostly inland floodingHigh

Willow Springsmostly inland floodingHigh

Palos Parkmostly inland floodingModerate

Homer Glenmostly inland floodingModerate

Homermostly inland floodingLow

Lemontmostly inland floodingLow

Downers Grovemostly inland floodingLow

Lemontmostly inland floodingLow

Woodridgemostly 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. Lemont covers 4 census tracts, combined by population.

Money that reached townFlood claims are matched to Lemont’s own flood-insurance community (here, the census tracts inside it); household aid to the registrant’s city; repair grants to the Township of Lemont. 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 Lemont total about $11.4M 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.