A prolonged and intense heat wave will grip the Phoenix metropolitan area, Yuma, El Centro, and the remainder of southern Arizona and southeast California through the weekend. High temperatures between 115 and 120 degrees will be common across the area Friday through Sunday. While hot temperatures are a regular feature in this part of the county, a heat wave of this proportion and duration is not common. Listed here numerous records and lists for extreme temperatures in Phoenix. Records for Phoenix began in 1896.