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Climate change has been leading to an increase in the frequency and magnitude of heatwaves. At present, three concurrent heatwaves are ongoing. On Sunday, Sanbao, China reached 126° setting a new national high temperature record. Temperatures were in the high 90s and low 100s in southern Europe with the heatwave likely to threaten or topple all-time records on Tuesday. The Southwestern U.S. has been in the midst of a severe long-duration heatwave that has seen the mercury set a new all-time mark at Kingman, AZ and tie the all-time record at Reno.
Through Sunday, Phoenix has had 17 consecutive days with 110° or above temperatures. The record of 18 days will very likely be tied today and broken tomorrow. A comparison of Phoenix’s three longest heatwaves is below: