[fencepost]

Drought in Africa is probably the most obvious, but other climate change-related migrations are basically guaranteed over the next 50-100 years.

Sea level rise will severely impact low-lying regions like most of Florida - not by putting them actually underwater, but by putting them closer to sea level which will make storm surges, etc more severe. Even if you recover, how many inundations with salt water will it take to have a significant impact? Not to mention salt intrusion into freshwater systems and aquifers.

In areas closer to the equator you'll also get higher heat - not always but regularly enough to render some areas unlivable without artificial cooling, and many of those places are ones that don't have the resources to provide cooling centers.

You'll also get more extremes at both ends - think of increasing the amount of heat energy in the atmosphere as being like increasing the amount of electricity going to a cone speaker. That speaker cone doesn't only move in one direction, what the increased energy does is increase the amount of movement. With the increased energy you also get distortion (extreme weather events vs just gradual change) and if you're really unlucky you get a one-way change of state (severe irreversible climate-driven event or a blown speaker).

Edit: forgot to include "Climate-induced migration in the Global South: an in depth analysis" https://www.nature.com/articles/s44168-024-00133-1