# Extreme Heat Warning: Iowa; Johnson; Cedar; Muscatine; Scott; Keokuk; Washington; Louisa; Jefferson; Henry; Des Moines; Van Buren; Lee; Rock Island; Mercer; Henderson; Warren; Hancock; McDonough; Scotland; Clark — retained record

> Retained us-gov-api record from us-gov-api:noaa-weather.

Canonical: https://highsignal.app/data/records/21755df1191ebeb3

[← sources](https://highsignal.app/data)


source: [us-gov-api](https://highsignal.app/data/us-gov-api) (us-gov-api:noaa-weather)  published 2026-06-29 01:16 ingested 2026-06-29 10:40

[original source ↗](http://www.weather.gov/)

## extract

Extreme Heat Warning — Iowa; Johnson; Cedar; Muscatine; Scott; Keokuk; Washington; Louisa; Jefferson; Henry; Des Moines; Van Buren; Lee; Rock Island; Mercer; Henderson; Warren; Hancock; McDonough; Scotland; Clark
Severity: Severe. Certainty: Likely.
* WHAT...Dangerously hot and humid conditions with multiple days of
heat index values of 100 to 110 expected, along with nighttime
lows not falling below the mid to upper 70s.

* WHERE...Portions of northwest and west central Illinois, east
central and southeast Iowa, and northeast Missouri.

* WHEN...Until 10 PM CDT Wednesday.

* IMPACTS...Heat related illnesses increase significantly during
extreme heat and high humidity events.

* ADDITIONAL DETAILS...The extreme heat may persist through late
week, but thunderstorms and associated clouds may interrupt the
heat at times Thursday and Friday.

## 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The historical document was shared with another weather alert and cannot be attributed to this record.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.