Temperatures are expected to remain hotter than normal for the foreseeable future, forecasters said Saturday.
The peak is likely Sunday, followed by slight cooling Monday through Wednesday before the heat revs upward again Thursday and into next weekend.
“The hot daytime and warm night conditions will bring elevated risks for heat illness,” the National Weather Service warned.
Forecasters noted the weather system will also keep temperatures elevated in many areas at night, when people normally get some relief from the heat.
“The combination of above normal daytime highs and overnight lows along with the higher humidities will create a dangerous environment as people’s bodies (those without air conditioning) will be heat stressed day and night with no real recovery period,” according to the NWS. “For all of these reasons heat advisories are in effect through Monday evening.”
The heat advisory covers almost the entire L.A. area, and will remain in force until 8 p.m. Monday.
Forecasters said daytime highs could range from 97 to 107 degrees.
Inland coastal areas, including downtown Los Angeles, will also be under a heat advisory through Monday, with daytime highs potentially reaching 96 degrees, the NWS said.
The Antelope Valley was under an Extreme Heat Warning that will also be in place through 8 p.m. Monday, with highs there expected to range from 100 to 108 degrees.
Heat advisories will also be in place until 8 p.m. Monday across Orange County.
The city of Los Angeles urged residents to take precautions during the heat event by staying hydrated, seeking shade or air-conditioned buildings and limiting strenuous outdoor activities to the morning or evening hours whenever possible.
People without access to air conditioning were encouraged to seek relief at public libraries, recreation facilities, senior centers or other public buildings.
Information about cooling centers is available by calling 311 or online through the city’s emergency management website at emergency.lacity.gov/heat.
Forecasters said the prolonged heat wave is expected to continue into early next week with little day-to-day change in temperatures.
Some cooling is anticipated on Tuesday, but by Wednesday, “highs will still be above normal but only by 3 to 5 degrees.”