Meh. Climate change is devastating for huge chunks of the planet. But the population of the hottest parts could easily move to cooler parts of the world, most of which are sparsely populated.
I cant see the article but yes it isn't easy to be a refugee right now. However I'd think places like Siberia would actually be much better with 100 million poor people from India who could build cities from scratch (over decades of course).
I would not describe relocating billions of people hundreds to thousands of miles north, often across country borders, as easy.
This article contains some stories of a few climate refugees of today:
https://www.nytimes.com/interactive/2020/07/23/magazine/clim...