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Natural hazards · Cahokia Heights

Cahokia Heights, IL natural hazards

Most of the natural-hazard damage FEMA expects in Cahokia Heights comes from inland flooding, and overall the risk is very high for a U.S. community. Flood insurance has paid 83 claims here since 1979. 2 federal disasters brought FEMA money into town.

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

How exposed is Cahokia Heights?

82
Very high
vs. U.S. communities

FEMA expects yearly storm and flood damage to homes and buildings in Cahokia Heights to be higher than in 82% of U.S. communities, mostly from inland flooding and earthquakes.

Inland flooding45%Earthquakes27%Heat waves9%Cold waves8%Tornadoes7%Everything else4%
By hazard

What Cahokia Heights faces

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

Inland flooding

45% of expected damage
Well above average · higher than 88% of U.S. places
Recorded about 2 times a year in the area

Earthquakes

27% of expected damage
Well above average · higher than 86% of U.S. places

Heat waves

9% of expected damage
Well above average · higher than 80% of U.S. places
Recorded about 15 times a year in the area

Cold waves

8% of expected damage
Well below average · higher than 20% of U.S. places
Recorded about once a year in the area

Tornadoes

7% of expected damage
Well above average · higher than 78% of U.S. places

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 Cahokia Heights flood?

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

83paid claims since 1979
$468Kpaid to owners
3homes flooded more than once
19792026

Biggest named events

  • Midwest Flooding: 10 claims, $16K
  • March storm: 2 claims, $4K
  • Late July Flooding: 1 claim, $8K

Homes that flooded again and again

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

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

What’s been done with FEMA grants

55flood-prone properties bought out and cleared
Disasters that hit Cahokia Heights

2 federal disasters brought FEMA money here

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

Brought FEMA money into Cahokia HeightsDeclared for St. Clair County only
2024

Severe Storms, Tornadoes, Straight-Line Winds, and Floodng

673 households applied for aid $2.9M aid approved
2022

Severe Storm and Flooding

453 households applied for aid $1.3M aid approved
St. Clair County has had 17 natural disasters declared since 1953, most often floods and severe storms.
Around Cahokia Heights

Cahokia Heights and the towns around it

Centreville: Very high, mostly inland floodingEast St. Louis: Very high, mostly inland floodingEast St. Louis: Very high, mostly inland floodingSauget: Very high, mostly inland floodingStookey: Moderate, mostly earthquakesSugar Loaf: Very high, mostly inland floodingBelleville: High, mostly earthquakesSt. Louis: High, mostly heat wavesCanteen: Very high, mostly inland floodingWashington Park: Very high, mostly inland floodingFairmont City: Very high, mostly earthquakesFairview Heights: Moderate, mostly earthquakesStites: High, mostly earthquakesCaseyville: High, mostly inland floodingSt. Clair: High, mostly inland floodingMillstadt: High, mostly inland floodingMillstadt: High, mostly inland floodingDupo: Very high, mostly inland floodingLemay: High, mostly heat wavesSwansea: High, mostly inland floodingSmithton: High, mostly earthquakesShiloh Valley: High, mostly inland floodingFreeburg: High, mostly inland floodingSmithton: High, mostly earthquakesFreeburg: High, mostly inland floodingCaseyville: High, mostly earthquakesVenice: High, mostly inland floodingGlasgow Village: High, mostly heat wavesClayton: Moderate, mostly earthquakesRiverview: Moderate, mostly heat wavesRichmond Heights: High, mostly inland floodingChouteau: High, mostly inland floodingCahokia Heights: Very high, mostly inland flooding Cahokia HeightsCentrevilleEast St. LouisEast St. LouisSaugetStookeySugar LoafBellevilleSt. Louis
Very lowLowModerateHighVery high
East St. Louismostly inland floodingVery high
East St. Louismostly inland floodingVery high
Centrevillemostly inland floodingVery high
Saugetmostly inland floodingVery high
Sugar Loafmostly inland floodingVery high
Cahokia Heightsmostly inland floodingVery high
St. Louismostly heat wavesHigh
Bellevillemostly earthquakesHigh
Stookeymostly earthquakesModerate
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. Cahokia Heights covers 5 census tracts, combined by population.
Money that reached townFlood claims are matched to Cahokia Heights’s own flood-insurance community; household aid to the registrant’s city; repair grants to the City of Cahokia Heights. 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 Cahokia Heights total about $9.7M 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.

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