True. What will happen though is that these regions will suffer from stagnating (or even declining) productivity and anaemic growth. Farms will produce less so more energy will be used on fertilizers and irrigation. Everything will have to be air conditioned - more energy expenditure. At an individual level, productivity will drop off as people deal with the heat and humidity.

Personally, living in India, I’ve watched my summers become worse and worse every year. And while I have no way to measure it, my productivity keeps going down with it in the summer.