Risk of mass deaths as heatwaves start to pass survivability threshold
Between 1.5 and 2°C of global warming will lead to heatwaves so extreme that healthy people can't survive outdoors for long, in areas where people aren't used to extreme heat
![Risk of mass deaths as heatwaves start to pass survivability threshold](https://images.newscientist.com/wp-content/uploads/2023/09/08131631/SEI_170668178.jpg)
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