It's the first weekend of fall, but it feels more like summer. In the valley and inland areas, highs are expected to hit the 100-degree mark by Sunday.
Monday is expected to be the hottest day in the seven-day forecast, with a high of 99 expected in the L.A. area.
A heat warning was issued on Friday for the desert areas of Riverside County, including Blythe, Cabazon, Cathedral City, Coachella, Desert Hot Springs, Indio, La Quinta, Mesa Verde, North Shore, Palm Desert, Palm Springs, Ripley, and Thermal.
Residents are advised to visit cooling centers and drink lots of water.
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