Environment & Science

Southern California braces for triple-digit temperatures

File: People relax in deck chairs during the hot weather on Brighton beach on August 1, 2013 in Brighton, England.
File: People relax in deck chairs during the hot weather on Brighton beach on August 1, 2013 in Brighton, England.
Mike Hewitt/Getty Images

A heat wave is descending on Southern California, with temperatures in some areas expected to reach triple digits by the end of the week.

The National Weather Service says a high pressure system moving in will bring temperatures Wednesday in the high 80s and well into the 90s across greater Los Angeles. By Saturday, temperatures could be four or five degrees higher.

NWS spokesman Stuart Seto said an excessive heat watch is in effect for all inland areas of L.A. County, as well as the mountainous areas, coastal and interior valleys of Ventura County. 

"Everywhere, basically, except for on the coast," Seto told KPCC. 

Friday looks like it will be the hottest day for most of the region. Temperatures are expected to reach 92 degrees in downtown Los Angeles, 104 in Pasadena and 107 in Woodland Hills, Seto said. 

A fire weather watch is also in effect for areas in Santa Barbara and along the I-5 corridor Friday afternoon through Friday night. Seto said gusty winds, high heat, and relatively low humidity will combine to make the are particularly susceptible to wildfire. 

"So definitely you want to be careful of any type of barbecues or anything for this weekend," he said. Seto also provided a few tips to help avoid sparking a blaze: 

Forecasters say the dry heat could bring increased risk of wildfires and health concerns for older people.

A cooling trend is predicted to start Sunday, the Associated Press reported.