text:  My advice is to stay indoors, keep your pets indoors. Donna Dunley is accustomed to extreme temperatures, but not this hot. Hydrate yourself, don't go to Death Valley. Many cities are facing extreme temperatures, including Las Vegas, Palm Springs and Phoenix. The forecast here calls for higher temperatures later in the week. For NPR News, I'm Steve Futterman in Baker, California. This is NPR News from Washington.