The number of consecutive days during which temperatures have not dropped below 90 degrees Fahrenheit in Phoenix after the city’s overnight temperature only dropped to 94 degrees on Monday, July 17. Phoenix is currently in a string of dangerously hot days and it is on track to smash the record for major U.S. cities on Tuesday, July 18, as it reaches its 19th day straight in which the temperature has reached 110 degrees or more.