The world’s hottest summers on record will be the new norm within 20 years due to human-influenced climate change, says the president of the Pacific Climate Impacts Consortium at the University of Victoria.
Climatologist Francis Zwiers co-authored a study confirming that sweltering summers as gauged by a long-standing measurement of human heat tolerance have become at least 70 times more likely over the past four decades. By 2050, virtually every summer will be hotter than any experienced to date.