 In Prescott. Arizona News Radio, President Biden announces new policies aimed at protecting workers from extreme heat this summer, citing above normal temperatures in several parts of the country. In Phoenix, Arizona, 112 degrees. In Las Vegas, 111 degrees. Above normal temperatures also expected for much of the country in July, especially in central and eastern United States. There have been 13 heat-related deaths confirmed and 162 other cases under investigation in Maricopa County.