This week's spring heat continues Tuesday when temperatures top out in the 90s and 100s in the valleys and inland areas.
It's going to be the warmest day of the week. A heat advisory is in effect until 9 p.m. before some gradual cooling overnight and into Wednesday morning.
"That's a long period of heat," said NBC4 forecaster Shanna Mendiola. "Exposure to this type of heat for several hours can mean the risk of heat-related illnesses. You've got to take it easy today."
The marine layer will thicken and temperatures are forecast to decline Thursday and Friday with valleys in the 80s, inland areas in the 70s and beaches in the upper 60s to 70s.
To the east of LA, Palm Springs is expected to reach 108 degrees that day, and Thermal is expected to see 107 degrees. Borrego Springs in San Diego County is predicted to reach 110 degrees on Tuesday.
An excessive heat warning is set to go into effect Tuesday morning, which warns of temperatures as high as 114 degrees in the Coachella Valley.
Temperatures in the 100s are typical for the desert region in June, but recent cooler-than-normal weather means people may not be accustomed to the heat.