Triple-digit temperatures are expected as energy officials warn the electrical load on Tuesday could reach the state's highest demand ever. Four deaths were reported as multiple wildfires burned.
California heat wave
One part of Los Angeles County hit 121 degrees this weekend, a county all-time record. Firefighters are battling many blazes, one of which was sparked by a pyrotechnic device at a gender reveal party.
Extreme heat waves are on the rise, but California regulators didn't plan for what that would do the state's electricity grid.