Salt Lake City, UT – Much of Utah and parts of southwest Wyoming are under an Extreme Heat Warning beginning Saturday as a prolonged stretch of dangerous temperatures is expected to push highs well into the triple digits while offering little overnight relief.
According to the National Weather Service in Salt Lake City, the warning begins at noon MDT Saturday, July 11, with expiration times varying by region. Much of northern and central Utah, including the Wasatch Front, Salt Lake Valley, Utah Valley, Cache Valley, Tooele Valley, Wasatch Back, Uinta Basin, Castle Country, and the San Rafael Swell, remains under the warning until 6 a.m. MDT Tuesday, July 14.
Forecasters say valley temperatures across northern Utah could reach 107 degrees, while many mountain valleys and central Utah communities are expected to climb to around 100 degrees. In southern Utah, temperatures may reach 110 degrees in Lower Washington County, Zion Canyon, and the Glen Canyon National Recreation Area. Southwest Wyoming, including Evanston and Lyman, is under an Extreme Heat Warning from noon Saturday through 9 p.m. MDT Monday, with highs near 98 degrees.
The National Weather Service said there is high confidence that temperatures from Saturday through Monday will challenge daily, monthly, and in some locations, all-time heat records. Overnight lows remaining in the 70s, and even the low 80s in parts of southern Utah, are expected to provide little relief from the heat.
Officials warn the prolonged heat will significantly increase the risk of heat-related illnesses, particularly for older adults, children, outdoor workers, and those without reliable air conditioning. Residents are urged to stay hydrated, remain in air-conditioned buildings when possible, avoid strenuous outdoor activities during the hottest part of the day, and never leave children or pets inside parked vehicles, where temperatures can become deadly within minutes.
Anyone experiencing symptoms of heat stroke should seek emergency medical assistance immediately by calling 911.
