A late-summer heat wave has reached Southern California and will continue into the weekend with no relief until Sunday.
Most areas can expect an increase of 5-10 degrees compared to normal temperatures. An increase in humidity is also expected. The forecast is shaping up to be the hottest of the summer, according to the National Weather Service.
Local news from across Southern California
"Although this will not be a prolific heat wave event, daytime high temperatures will continue to be the warmest we have seen this summer across the interior locations,'' according to an NWS advisory.
In the Greater Los Angeles Area, the hottest spot will be the Antelope Valley, where highs will reach 108 degrees by Thursday.
"The warmest valley locations will approach 100 degrees Tuesday with widespread temperatures peaking between 98 and 104 degrees by Wednesday and Thursday," according to a special weather statement issued for Los Angeles County. "The foothills and lower mountain elevations such as Acton will see similar temperatures as the warmest valleys as well through the same period."
Here are the breakdowns for LA's two weather extremes:
Excessive heats warnings were issued Tuesday for Riverside and San Bernardino counties, with temperatures soaring past 100 degrees in some areas.
"An excessive heat warning is issued when temperatures are forecast to reach dangerous levels that will stress the body if precautions are not taken," according to an NWS advisory.
In Hemet, the high was near 104. A high of 111 was expected for Palm Springs.
"Take extra precautions if you work or spend time outside," according to the NWS. "When possible, reschedule strenuous activities to early morning or evening. Know the signs and symptoms of heat exhaustion and heat stroke. Wear light-weight and loose-fitting clothing when possible and drink plenty of water."
Starting Friday afternoon, Riverside and San Bernardino counties will have a 20 percent chance of storms.
"To escape the heat, head toward the coast," according to the NWS.
"Along the beaches, daytime temperatures in the mid 70s to lower- 80s, while inland coastal temperatures will reach around 90 degrees from Wednesday through Saturday."
The NWS forecasts highs Tuesday of 72 in Ventura, 73 in Newport Beach and 76 at LAX.
Santa Monica will peak with a high of 78 degrees on Thursday.