Cooling off will be required by many in the Las Vegas Valley as a high of 90 is forecast for Sunday, May 9, 2021, according to the National Weather Service. Butters, Las Vegas resident Lisa Klosowski’s dog, cools off at the Paseos Park splash pad in Las Vegas, Saturday, May 8, 2021. (Chitose Suzuki / Las Vegas Review-Journal) @chitosephoto