A heat warning will be in effect for south-central Pinal County, the Tohono O'odham Tribal Reservation, the Tucson metropolitan area and western Pima County from 11 a.m. on July 5 to 8 p.m. on July 6. Areas west of Tucson will be the hottest, with temperatures expected to range between 109 and 114 degrees Fahrenheit, according to the weather service.
