A heat wave was expected to start sweeping across already sweltering Southern California on Wednesday and forecasters said it could push temperatures up to 20 degrees above normal over the next three days.
A large area of high pressure will create a warming trend that should continue through Friday, according to the National Weather Service. Triple-digit temperatures are expected in the western San Fernando Valley, Santa Clarita Valley and Ventura County, and other areas will feel like it's in the 100s when the humidity is factored in.
"And there will not be much overnight relief," said weather service specialist Stuart Seto. "Temperatures will start in the mid- to upper 70s at night."
Some hot spots include Pasadena, Woodland Hills and Burbank, all of which are expected to see the mercury rise to 102 degrees. Lancaster and Palmdale can expect temperatures of 99 on Wednesday, 101 on Thursday and 99 on Friday, according to the weather service.
Those looking to cool off this week can head to the coast, where the ocean breeze will keep the temperatures in the 70s, or to one of several cooling centers open throughout Los Angeles County.
There could be some relief over the weekend, but it will still be warmer than normal, Seto said, and temperatures are expected to rise again next week.