Officials in Los Angeles County announced Wednesday that cooling centers would be opening as the National Weather Service predicted "record-setting" and "life-threatening" temperatures across Southern California.
The excessive heat is expected to last from Friday morning through Monday night with triple-digit temperatures across inland and mountain areas, the Weather Service said.
The agency issued excessive heat warnings or watches from San Luis Obispo to San Diego counties.
Temperatures in Antelope Valley could top out at 115 degrees, according to the Weather Service. Highs could reach the 80s along the coast and be near 90 in downtown Los Angeles.
On Wednesday, the temperature hit 100 degrees in Lancaster, 96 in Woodland Hills and 92 in Pomona. Downtown L.A. topped out at 82, according to the Weather Service.
In Los Angeles County, 89 cooling centers were open from Avalon to Lancaster. Click on the following link for an interactive map of the centers.
The Weather Service is urging people to reschedule strenuous activities for the early morning or evening hours and to prepare shady areas for animals and people working outdoors.