An early-season heat wave will impact millions across the western U.S. into next week. The highest temperatures will be felt across the Desert Southwest as highs are forecast to climb into the 90s again in Los Angeles and Las Vegas with more triple digits in Phoenix. The risk for heat-related illnesses will be on the rise, so be sure to stay hydrated, limit time outdoors if possible and keep a close eye on family and friends. Here’s the latest.