Cahokia Heights, IL
Local storm history & FEMA National Risk Index data
Cahokia Heights is rated Relatively High for overall natural hazard risk — higher risk than most US counties — based on FEMA's National Risk Index for St. Clair County, IL. The county's highest-rated hazards are heat wave, earthquake, and hail.
Storm events near Cahokia Heights
NOAA-recorded tornado, hail, and flood events within 25 miles of Cahokia Heights's center, 2016–2026 — the only hazards NOAA reports with exact coordinates, so these counts are specific to Cahokia Heights itself, not the whole county.
County-wide hazard risk
Every other hazard FEMA and NOAA track — including drought — is only scored at the county level. These are St. Clair County's FEMA National Risk Index scores, covering Cahokia Heights along with the rest of the county, not a Cahokia Heights-specific figure.
| Hazard | NRI score | Rating |
|---|---|---|
| Wildfire | 15.1 | Very Low |
| Inland Flooding | 94.5 | Relatively High |
| Coastal Flooding | — | Not Applicable |
| Earthquake | 98 | Relatively Moderate |
| Heat Wave | 98.1 | Relatively High |
| Tornado | 95.5 | Relatively High |
| Avalanche | — | Not Applicable |
| Cold Wave | 96.4 | Relatively High |
| Drought | 61.4 | Relatively Low |
| Hail | 97.6 | Relatively High |
| Hurricane | 34.9 | Very Low |
| Ice Storm | 91 | Relatively High |
| Landslide | 84.3 | Relatively Low |
| Lightning | 93.7 | Relatively High |
| Strong Wind | 54 | Relatively Moderate |
| Tsunami | — | Not Applicable |
| Volcanic Activity | — | Not Applicable |
| Winter Weather | 87.2 | Relatively High |
Source: FEMA National Risk Index v1.20.0, December 2025. See the methodology page for definitions, or the full St. Clair County risk profile for disaster declarations, social vulnerability, and climate projection data.
Other cities in St. Clair County:
More on St. Clair County:
Frequently asked questions
What natural hazards is Cahokia Heights, IL at risk of?
Cahokia Heights is rated Relatively High for overall natural hazard risk by FEMA's National Risk Index — higher risk than most US counties. The highest-rated hazards for St. Clair County, where Cahokia Heights is located, are heat wave, earthquake, and hail.
What is Cahokia Heights's biggest natural hazard risk?
Heat Wave is the highest-rated hazard for St. Clair County, where Cahokia Heights is located, scoring 98.1 out of 100 on FEMA's National Risk Index (rated "Relatively High").
Is Cahokia Heights a high-risk area for natural disasters?
Yes — Cahokia Heights carries higher risk than most US counties for overall natural hazard risk, per FEMA's National Risk Index rating of "Relatively High" for St. Clair County.
Has Cahokia Heights had tornadoes, hail, or flooding?
NOAA has recorded 49 tornado, 320 hail, 67 inland flooding events within 25 miles of Cahokia Heights since 2016.