"We found that killer heatwaves around the world are becoming more common, and that this trend already seems unavoidable," said Camilo Mora, a professor at the University of Hawaii and lead author of the study.
"Even if we outperform the Paris targets, the population exposed to deadly heat will be about 50 percent by 2100," he told AFP. . . .
Since the start of the 21st century, heatwaves have claimed tens of thousands of lives, even in countries best equipped to help their citizen cope. In western Europe, for example, there were more than 70,000 excess death during the blistering summer of 2003.
In future, the tropics will be hit hardest, according to the study, which forecasts -- year-by-year, for each square kilometre on Earth -- the number of "deadly days" under three different carbon pollution scenarios laid out by the UN Intergovernmental Panel for Climate Change (IPCC).
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