Temperatures will continue to increase during the latter half of this week resulting in widespread major to locally extreme HeatRisk. Lower desert high temperatures will reach 105-117 degrees, while lows will be in the upper 80s to middle 90s. An Extreme Heat Warning is in effect for much of southeast California starting Wednesday, then expanding to include much of the Arizona lower deserts Thursday through Monday.
A high pressure center will expand and strengthen this week leading to warming temperatures across the region. Major HeatRisk will become widespread across the lower deserts with areas of extreme HeatRisk. This heat episode will likely persist through early next week.
Increasingly hot and humid conditions will develop over the next few days creating Major to even localized Extreme HeatRisk across the area. Practicing good heat safety will be vital if you need to spend any length of time outdoors. Extreme Heat Warnings go in effect across southeast CA today and then across much of southern and central Arizona starting Thursday. The most dangerous heat is expected to be Friday-Sunday.
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