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It’s one of the scariest questions facing billions of humans on a hotter planet: How many of us will die from extreme heat in the decades ahead?

Your future risk of dying from heat will be determined by where you live and economic inequality…
A major paper released today by the @impact_lab maps the relationship between temperature, income, and mortality.

The researchers determined that the toll from heat will be far worse than expected
The global annual mortality rate at the end of this century is set to rise by average of 73 deaths per 100,000 people solely from excess heat.

That’s a death rate comparable to the 79 per 100,000 that New York State has seen from Covid-19 since January
Millions of lives can be saved, if we slash emissions and raise incomes.

Economic development can reduce projected mortality from extreme heat at the century’s end by about 60%, according to @impact_lab
Parts of the world have already warmed by more than twice the current global average. That trend will leave more people vulnerable to extreme heat.

In some regions working outside for a few hours will be deadly
Income will divide the fate of every person on Earth.

Regions with higher incomes over time are more likely to spend money on health and safety measures, while the poor will continue to face higher risks
Within borders, wealth inequality will create wildly varying climate risks for citizens of the same country.

Indigenous and Black people in the U.S. today suffer the highest and second-highest heat-related death rates
Killer heat is already here. The last six years have been the hottest ever recorded, and 2020 will almost certainly take its place near the top.

U.S. deaths from heat-related causes each year could increase as much as eightfold by 2099
Rising temperatures will only exacerbate today’s social and economic chasms, leading to more heat-related deaths—unless growth and investment can better equalize risks and reduce danger for everybody
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