An Extreme Heat Warning remains in effect for large portions of northern and central Utah through 6 a.m. MDT Tuesday, as the National Weather Service warns of dangerously hot conditions that could challenge all-time temperature records. Forecasts indicate valley temperatures may climb as high as 107 degrees during this period.
Widespread Heat Impacts
The National Weather Service Salt Lake City issued the warning, noting that the heat event encompasses a wide range of locations across the region. The warning covers the Great Salt Lake Desert and Mountains, Tooele and Rush Valleys, and the Northern Wasatch Front, along with the Salt Lake Valley and Utah Valley.
Other impacted areas include Cache Valley, the Wasatch Back, Western Uinta Basin, and parts of eastern Juab and Millard Counties. The warning also extends to Sanpete Valley, Sevier Valley, Castle Country, San Rafael Swell, and Eastern Box Elder County. Specific towns included in the alert range from Snowville, Lehi, and Provo to more eastern locations like Price, Moab, and Green River.
Record Temperature Potential
Meteorologists expressed high confidence that the upcoming heat could push temperatures to levels that challenge daily, monthly, or even all-time high temperature records. While valley areas face the most intense heat with potential highs of 107 degrees, mountain valleys in northern and central Utah—including the Wasatch Back, Castle Country, the Uinta Basin, and the San Rafael Swell—may see highs around 100 degrees.
Adding to the difficulty of the weather event, officials noted that overnight lows are expected to remain in the lower to mid-70s for many valley locations. This lack of cooling during the night provides little relief from the daytime heat, increasing the cumulative risk of heat-related exhaustion and heat stroke.
Safety Precautions and Risks
The National Weather Service emphasized that heat-related illnesses increase significantly during extreme heat events. To mitigate these risks, the agency advises residents to drink plenty of fluids, stay in air-conditioned rooms, and avoid direct sun exposure. It is also critical to check on relatives and neighbors who may be more vulnerable to temperature spikes.
Specific warnings were issued regarding vehicle safety: individuals should never leave young children or pets in unattended vehicles, as car interiors can reach lethal temperatures within minutes. For those performing outdoor work, the National Weather Service pointed to Occupational Safety and Health Administration (OSHA) recommendations, which suggest scheduling frequent rest breaks in shaded or air-conditioned environments.
Evolving Hazard Risks
As the heat persists, the National Weather Service's graphical hazardous weather outlook for the region tracks various risk levels. While some areas may only see limited heat exhaustion possible with prolonged exposure, other parts of the forecast area face a higher tier of danger where significant heat exhaustion or heat stroke is likely with prolonged exposure.
In the most extreme scenarios, the agency warns that dangerously hot conditions could quickly result in life-threatening medical emergencies. The agency notes that heat stroke itself is a medical emergency and instructs anyone overcome by heat to be moved to a cool, shaded location immediately and to call 911.
Duration of Warning
The current Extreme Heat Warning is scheduled to remain in effect until 6 a.m. MDT on Tuesday morning. Residents are encouraged to monitor their local forecasts and take extra precautions, such as wearing lightweight and loose-fitting clothing and limiting strenuous outdoor activities to the early morning or evening hours.
