It's the third consecutive day of brutal heat, with highs in the upper 90s in the Los Angeles-Metro area and Orange County, and the valleys and inland exceeding 100 again.
However, temperatures are expected to drop by 10 degrees in some areas on Friday and continue to fall through the weekend.
On Wednesday, the temperature in downtown Los Angeles was about 12 degrees higher than normal for this time of year. Some vendors at a farmers market had to close early because of the heat.
Some high school athletes in Santa Clarita delayed their practices until it was cooler and safer to work out.
To deal with the heat wave, people cranked up their air conditioners. The Los Angeles Department of Water and Power said Wednesday was the highest energy demand so far this year. Southern California Edison also said it set a record for usage for the second day on Wednesday.
In the Inland Empire, the fire department responded to the runway at March Air Reserve Base after an F-16's brakes overheated.
It's unknown whether it was weather related, but everything ended up being OK.
Other residents took to Lake Perris to find relief in the triple digit heat.
"We just came down here to get out of the heat, and enjoy some of this beautiful outdoors," said Fonatana resident Rayton White.
To conserve energy, you can adjust your thermostat to 78 degrees during the hottest times of the day. Avoid using big appliances during peak hours, and close your blinds or drapes to reduce the extra heat that's coming in from the sunlight.
Health officials warn residents to minimize time spent outdoors and not to leave children or pets in unattended cars. If you are going to brave the hot temperatures make sure to drink plenty of water, stay in the shade and wear a hat.