Officials in Zion National Park are cleaning up after a series of flash floods washed over southern Utah. The park received more than an inch of rain over the course of an hour Tuesday, officials said. The National Weather Service warned of flash flooding: "Remember, slot canyons, slick rock areas and normally dry washes are the worst place to be during thunderstorms," the agency reported in a tweet. 📸 from Utah Department of Transportation, National Park Service #zionnationalpark #zion #utah #flood