WEATHERThis is what 12 days of extreme heat looks like in PhoenixArizona RepublicAn Arizona license plate in Sedona on July 10, 2023, sums up the weather forecast this week: “HEAT N UP.”Rob Schumacher/The RepublicRafts are carried up the stairs to ride Thunder Falls during sunset at Golfland Sunsplash on July 11, 2023, in Mesa.Rob Schumacher/The RepublicPhoenix cleared the fourth block of The Zone homeless encampment, on July 12, 2023, on Ninth Avenue between Jefferson and Madison Streets in Phoenix.Mark Henle/The RepublicThe Chaparral High football team run conditioning drills in Scottsdale on July 13, 2023, the 14th day in a row of temperatures 110 degrees or more.Rob Schumacher/The RepublicHeat shimmer causes visual distortion as Delta Airlines flight DL796 from Atlanta touches down at Phoenix Sky Harbor International Airport, as the city experienced the 15th day in a row of temperatures at 110 degrees or more on July 14, 2023.Rob Schumacher/The RepublicClimbers watch the sunrise on the summit of Piestewa Peak on the 16th day in a row of temperatures 110 degrees or more on July 15, 2023. Phoenix will close the Piestewa Peak Summit trail from 11 a.m. to 5 p.m. due to a long-duration excessive heat warning with a forecasted high of 117 degrees on Sunday.Rob Schumacher/The RepublicK.C. Griffin (left) sits in a crowded room at Justa Center, one of the valley's many cooling centers during a heat wave on July 16, 2023 in Phoenix.Megan Mendoza/The RepublicThe first dust storm of the monsoon season rolls over Camelback Mountain in Paradise Valley on July 17, 2023. Monday was the 18th day in a row of temperatures 110 degrees or more, which tied the record from 1974.Rob Schumacher/The RepublicA water play area at the Phoenix Zoo provides relief from the extreme heat wave in central Arizona on July 18, 2023. Tuesday was the 19th day in a row of temperatures of 110 degrees or more, which set a record.Rob Schumacher/The RepublicA handheld fan provides relief from the 116-degree heat as fans arrive for the Morgan Wallen concert at Chase Field on July 19, 2023. Phoenix set three records on Wednesday with a low of 97 degrees and a high of 116 degrees. It was the 20th day in a row of temperatures of 110 degrees or more.Rob Schumacher/The RepublicThe Phoenix Fire Department battles a propane fire in 119-degree heat near Phoenix Sky Harbor International Airport on July 20, 2023.Rob Schumacher/The RepublicA sprinkler waters a fairway at Dobson Ranch Golf Course in Mesa on the 22nd day in a row of temperatures of 110 degrees or more on July 21, 2023.Rob Schumacher/The Republic