Extreme Heat Warning: St. Clair; Monroe; Jefferson

source: us-gov-api (us-gov-api:noaa-weather)published 2026-07-27 21:10ingested 2026-07-28 08:32

extract

Extreme Heat Warning — St. Clair; Monroe; Jefferson Severity: Severe. Certainty: Likely. * WHAT...Dangerously hot conditions with heat index values up to 106. * WHERE...In Illinois, Monroe IL and Saint Clair IL Counties. In Missouri, Jefferson MO County. * WHEN...Until 7 PM CDT Tuesday. * IMPACTS...Heat related illnesses increase significantly during extreme heat and high humidity events.

retained text

The historical document was shared with another weather alert and cannot be attributed to this record. The original extract is preserved above; the exact alert link was not retained.