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

As the entire electric system is spinning at a certain rate, if there is a fault, something that is a resistance to that spinning, if you have a large mass like Diablo Canyon, that provides a great resistance to that change in frequency. That protects the greater system and makes it more reliable and resilient to a change.

High school football teams across the West Coast delayed games as triple-digit heat threatened player safety. Schools implemented new monitoring systems and protocols.

The peak of the heat wave is expected Thursday and Friday, the National Weather Service said. While it’s brought hotter temperatures than in recent weeks, it is not particularly extreme in terms of all-time Southern California highs. “This is definitely more normal heat for this time of year,” Sam Zuber, an NWS meteorologist said.

The heat advisories are expected to last through Saturday night, with temperatures gradually returning to normal by next week. Residents are advised to stay vigilant for weather updates, particularly regarding thunderstorms and flash flooding risks in mountainous and desert regions.

Northern California's second heat wave of the year is set to continue Thursday, with the possibility of the hottest day of the year so far during this stretch of triple-digit temperatures.

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

The system’s length and strength will be compounded by some offshore winds, which will help keep any marine influence at bay and keep temperatures high, even overnight.