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,

LADWP and Southern California Edison officials have been asking customers to conserve energy due to the strain on the system.

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.

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,