A heat wave is hitting Southern California, and temperatures will be as much as 20 degrees above normal through Thursday.

Southern California is baking under a powerful heat wave this week, prompting urgent warnings for more than 8 million people to limit time outdoors and stay cool. The National Weather Service (NWS) extended its heat advisory through 9 p.

Southern California will give way to sunny skies and rising temperatures this week, forecasters said. A prolonged heat wave will take hold starting Monday.