Natural hazards · Glen Carbon

Glen Carbon, IL natural hazards

Most of the natural-hazard damage FEMA expects in Glen Carbon comes from inland flooding, and overall the risk is moderate for a U.S. community. Flood insurance has paid 1 claim here since 2023. 1 federal disaster brought FEMA money into town.

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

Expected damage

How exposed is Glen Carbon?

Moderate

vs. U.S. communities

FEMA expects yearly storm and flood damage to homes and buildings in Glen Carbon to be higher than in 40% of U.S. communities, mostly from inland flooding and tornadoes.

Inland flooding28%Tornadoes20%Earthquakes16%Heat waves15%Cold waves14%Everything else7%

By hazard

What Glen Carbon faces

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

Inland flooding

28% of expected damage

Below average · higher than 36% of U.S. places

Recorded about once a year in the area

Tornadoes

20% of expected damage

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

Earthquakes

16% of expected damage

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

Heat waves

15% of expected damage

Well above average · higher than 86% of U.S. places

Recorded about 15 times a year in the area

Cold waves

14% of expected damage

Well below average · higher than 18% of U.S. places

Recorded about 2 times a year in the area

Lower here

HurricanesHailIce stormsWinter weatherWildfireLandslidesStrong 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 Glen Carbon flood?

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

1paid claims since 2023

$21Kpaid to owners

0homes flooded more than once

20232026

of all homes
are insured

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

Insurance rates: Madison County.

Disasters that hit Glen Carbon

1 federal disaster brought FEMA money here

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

Brought FEMA money into Glen CarbonDeclared for Madison County only

2006

Severe Winter Storm

$84K to the Village of Glen Carbon for repairs

Madison County has had 14 natural disasters declared since 1953, most often floods and severe storms.

Around Glen Carbon

Glen Carbon and the towns around it

Very lowLowModerateHighVery high

Pontoon Beachmostly inland floodingVery high

Collinsvillemostly inland floodingModerate

Edwardsvillemostly earthquakesModerate

Edwardsvillemostly inland floodingModerate

Maryvillemostly earthquakesModerate

Glen Carbonmostly inland floodingModerate

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. Glen Carbon covers 1 census tract, combined by population.

Money that reached townFlood claims are matched to Glen Carbon’s own flood-insurance community; household aid to the registrant’s city; repair grants to the Village of Glen Carbon. 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 Glen Carbon total about $3.9M 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.