On the present emissions pathway, it’s likely that the world will hit 4 degrees Celsius warming by 2100. And this level of warming will be enough to bring on heatwaves so hot that staying outside for even brief periods will be deadly. Such unimaginably severe heatwaves will affect heavily populated regions such as Eastern Europe, the U.S. East Coast, coastal China, India, and South America with bi-annual frequency.
(Probability that summer heat index values will exceed 40 C [104 F] and 55 C [131 F] under 1.5, 2 and 4 C warming. Note that biannual frequency of 55 C heat indexes over large regions under 4 C warming implies that strong heatwaves would be considerably more severe. Image source: Superheatwaves of 55 C Emerge if Global Warming Continues.)
These were the findings of a ground-breaking new report produced by Europe’s Joint Research Center. The report notes that many…
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