Tucson reached 100 degrees just after noon on Sunday, coming two days later than last year, the National Weather Service reported.
It was the eighth-earliest day the city has reached the 100-degree mark going back to 1895, with the temperature climbing to 103 degrees at Tucson International Airport by mid-afternoon.
While May’s temperatures are not expected to break the 111-degree record set for the month in 1910, Tucson has recorded 19 straight months in which the average temperature was above normal.
The weather service predicts the hottest days of 2018 so far can be expected this week, with temperatures reaching or surpassing 100 degrees through Friday.
Phoenix, which experienced its first 100-degree day April 10, reached 106 degrees on Sunday, breaking a previous record of 105 degrees set in 1947, according to The Associated Press.
In the Tucson area, Rural Metro firefighters responded to multiple calls for hikers with heat-related illnesses in Sabino Canyon, Seven Falls and Redington Pass, according to the department’s Facebook page.
