Day and night Phoenix has sweltered from heat that will break a record for American cities

Phoenix’s relentless streak of dangerously hot days is finally poised to smash a record for major U.S. cities on Tuesday, the 19th straight day the desert city is to see temperatures soar to 110 degrees Fahrenheit or more. Nighttime has offered little relief from the brutal temperatures. Phoenix’s low of 95 on Monday was its highest overnight low ever, toppling the previous record of 93 set in 2009. It was the eighth straight day of temperatures not falling below 90, another record. The length of Phoenix’s heat wave is notable even during a summer in which much of the southern United States and the world as a whole has been cooking in record temperatures.