We're already thriving in many areas with lethally high and low temperatures. The big difference is going from cold being a threat to heat being one. We instinc

We're already thriving in many areas with lethally high and low temperatures. The big difference is going from cold being a threat to heat being one. We instinctively know that going out when it's freezing, unprepared, is a pretty bad idea, but the pairing of heat+humidity doesn't tend to give as obvious of signs as 'my spit freezes before it hits the ground.' If anything it'd be a mixture of a mindset change, and also probably a gradual shifting of where the ultra-premium places to live on the planet are, as well as what plants grow most optimally where, and so on.