As the planet heats and crops fail, millions of people will be forced to choose between flight or death.

New research suggests that climate change will cause humans to move at an unprecedented scale.

And for many, this great migration has already begun. https://nyti.ms/3jrgZZY 
Today, 1% of the world is a barely livable hot zone.

By 2070, that portion could go up to 19%.

Billions of people call this land home.

Where will they go?

OUR COVER STORY THIS WEEK: http://nyti.ms/3jrgZZY 
Under relentless drought, flood, bankruptcy and starvation, the residents of Alta Verapaz in Guatemala have begun to leave.

Researchers project that by 2070, yields of some staple crops in the state will decline by nearly a third
http://nyti.ms/3jrgZZY 
In the African Sahel, past droughts, likely caused by climate change, have already killed more than 100,000 people.

Amid that and crop failures, millions of people continue to move toward its coasts and cities http://nyti.ms/3jrgZZY 
In South Asia, some 8.5 million people have fled already, but 17 to 36 million more may soon be uprooted, the World Bank found.

By the end of the century, heat and humidity will be so extreme there that many people without air-conditioning may simply die http://nyti.ms/3jrgZZY 
We are now learning that climate scientists have been underestimating the future displacement from rising tides by a factor of three, with the likely toll being some 150 million globally http://nyti.ms/3jrgZZY 
The window for action is closing.

Without preparation and planning, the sweeping scale of climate change could prove wildly destabilizing. http://nyti.ms/3jrgZZY 
Read Part 1 in our series of stories about how migration because of climate change will lead to a vast remapping of the world’s populations: http://nyti.ms/3jrgZZY  https://twitter.com/NYTmag/status/1286282366919618560
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