Extreme Heat Warning: Western Millard and Juab Counties; Southwest Utah; South Central Utah; Capitol Reef National Park and Vicinity; Western Canyonlands; Glen Canyon Recreation Area/Lake Powell

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Extreme Heat Warning — Western Millard and Juab Counties; Southwest Utah; South Central Utah; Capitol Reef National Park and Vicinity; Western Canyonlands; Glen Canyon Recreation Area/Lake Powell Severity: Severe. Certainty: Likely. * WHAT...Dangerously hot conditions expected, with highs around 100 possible for most central and southern Utah valleys and up to 110 for Lower Washington County, Zion Canyon, and the Glen Canyon Recreation Area. * WHERE...Western Millard and Juab Counties, Capitol Reef National Park and Vicinity, Glen Canyon Recreation Area/Lake Powell, South Central Utah, Western Canyonlands, and Southwest Utah. * WHEN...Until 6 AM MDT Monday. * IMPACTS...Heat related illnesses increase significantly during extreme heat events. * ADDITIONAL DETAILS...There is high confidence that temperatures will warm to values challenging daily and monthly high temperature records Sunday. Overnight lows in the lower to mid 70s for many valley locations, except low 80s for lower Washington County, will provide little in the way of overnight relief.