Heat warnings remain in effect for the two counties until Saturday night, with a slight chance of thunderstorms.

The most intense heat of the summer arrives this week when parts of Los Angeles will be under extreme heat warnings and other areas will face severe fire conditions. What authorities described as a severe heat event with days of temperatures in the upper 90s and well into the 100s will begin Wednesday and continue through the weekend.

Thunder and brief rain showers moved across parts of Los Angeles County on Saturday morning, surprising many as an extended heat wave continues through the weekend. The National Weather Service reported scattered,

Some emergency room doctors and nurses who are versed in climate change want more recognition of the ways overheating can precipitate ER visits for heart, respiratory and kidney disease.

The late-summer heat wave that has baked much of the Southland took a surprising turn Saturday when a lightning and thunderstorm moved into the northern part of Los Angeles County, sparking multiple fires in the Angeles National Forest.

Extreme heat is baking Southern California as the most dangerous heat wave of the summer pushes temperatures well intro triple digits for much of the region. The heat, along with extreme drought and gusty conditions,

LA Unified School District officials say they’ll take steps to protect students and staff from the soaring temperatures expected to bake the Southland starting today and continuing throughout the region for the rest of the week.

LOS ANGELES (AP) — A dangerous, multiday heat wave descended on much of California and the U.S. Southwest, with near-record temperatures expected along with a higher risk of wildfires.