National Weather Service United States Department of Commerce
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Last Map Update: Mon, Aug 18, 2025 at 4:44:28 am MST

High pressure will build over the region this week resulting in a steady warming trend. HeatRisk will rise into the major category, with localized areas of extreme HeatRisk across the lower deserts by midweek. Shower and thunderstorm activity will be confined to the higher terrain for the majority of the week. Increasing moisture by the end of the week will result in chances (10-30%) returning to the lower desert communities.
Temperatures will steadily warm this week with readings approaching record territory during the middle and end of the week. HeatRisk will likely rise into a major, and even locally extreme category. As a result, an Extreme Heat Watch has been issued Wednesday through Friday
Widespread Major HeatRisk, with areas of localized Extreme Heat Risk, are expected during the middle to end of the workweek as temperatures warm well above normal. With these extreme temperatures, remember to practice smart heat safety.

 

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