@georgetakei And it's false in the relevant sense.

Yes, you can acclimate to some specific range of heat. Past a certain wet bulb temperature, it is not so; when it's that hot, the great grim gods of thermodynamics shall cause you to die.

We're in the first blushing springtime seasons of a world where if the air conditioning fails, you die. If the power goes out, it's a mass casualty event. (Good luck running away over melted roads.)