 In southern Utah, this fire doubled in size in less than 24 hours, making it difficult to fight as it bared down on the tiny town of Marysvale. Pretty scary how it went from 5,000 acres, and here we are. We're already over 10,000 acres. The extreme heat is also breaking records. It was 120 degrees in Las Vegas on Sunday. That's the hottest day ever recorded, and it's sending people to the emergency room. We call it our pavement burn season.