# Extreme Heat Warning: Great Salt Lake Desert and Mountains; Tooele and Rush Valleys; Eastern Box Elder County; Northern Wasatch Front; Salt Lake Valley; Utah Valley; Cache Valley/Utah Portion; Wasatch Back; Western Uinta Basin; Eastern Juab/Millard Counties; Sanpete Valley; Sevier Valley; Castle Country; San Rafael Swell — retained record

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

Canonical: https://highsignal.app/data/records/c0a51d3d72ef9fde

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


source: [us-gov-api](https://highsignal.app/data/us-gov-api) (us-gov-api:noaa-weather)  published 2026-07-11 21:59 ingested 2026-07-12 08:17

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

## extract

Extreme Heat Warning — Great Salt Lake Desert and Mountains; Tooele and Rush Valleys; Eastern Box Elder County; Northern Wasatch Front; Salt Lake Valley; Utah Valley; Cache Valley/Utah Portion; Wasatch Back; Western Uinta Basin; Eastern Juab/Millard Counties; Sanpete Valley; Sevier Valley; Castle Country; San Rafael Swell
Severity: Severe. Certainty: Likely.
* WHAT...Dangerously hot conditions with temperatures up to 107
possible for the valleys of northern Utah, including the Wasatch
Front and Cache Valley. Highs around 100 possible for the mountain
valleys of northern and central Utah, including the Wasatch Back,
along Castle Country, the Uinta Basin, and the San Rafael Swell.

* WHERE...Portions of central and northern Utah.

* WHEN...Until 6 AM MDT Tuesday.

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

* ADDITIONAL DETAILS...There is high confidence that temperatures
will warm to values challenging daily, monthly, or even all-time
high temperature records Sunday through Monday. Overnight lows in
the lower to mid 70s for many valley locations will provide little
in the way of overnight relief.

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The historical document was shared with another weather alert and cannot be attributed to this record.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