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The calendar may say September, but summer-like heat will persist throughout much of the Southwest over the next several days.
A sprawling area of high pressure aloft will start to build over the Southwest over the course of the work week, allowing temperatures to go from hot to very hot by the end of the week.
Temperatures will climb into the triple digits across portions of Arizona, southern Nevada, and interior portions of California. A few locations in southwestern Arizona and southeastern California may even top 110 degrees today!
As this ridge of high pressure gains strength over the next few days, temperatures will continue to warm. High temperatures over 100 degrees will become widespread today and will persist through the end of the week.
Residents in the Southwest will see little relief from the heat even at night as low temperatures will only drop into the 70s and 80s in many locations!
In anticipation of the excessive heat, Heat Advisories have been issued across portions of central California for today, including Sacramento and Fresno. Excessive Heat Watches and Warnings are posted across much of southern California into Arizona and southern Nevada for today as well. This includes Los Angeles, Las Vegas, and Phoenix.
If you are in one of these areas experiencing unseasonably hot temperatures, it will be important to stay hydrated and cool. Avoid exposure to the sun from late morning into the early evening. Take frequent breaks in the A.C. or shade. Eat and dress lightly. Use sun protection if outdoors. Never leave kids or pets unattended and remember to “Look Before You Lock!” Recognize the signs of heat-related illness.