 Extreme heat in the west intensifying this weekend, and that includes at a national park where the heat is often an attraction. On Sunday, Death Valley has a chance of hitting 130 degrees. If it officially does, that'll be the hottest temperature ever reliably recorded on Earth. Park rangers warn visitors to stay away when it's that hot, but they flock to Death Valley to experience it and get a photo with a giant thermometer. The rangers have told us you're on your own.