27 degrees is still relatively cool. As somebody else said above: > You can't beat the laws of thermodynamics. When the wet bulb temperature reaches the human

27 degrees is still relatively cool. As somebody else said above: > You can't beat the laws of thermodynamics. When the wet bulb temperature reaches the human body's natural 37 degrees Celsius, it'll be impossible for the body to expel heat via sweating (evaporative cooling). At that point no amount of adaptation will help, and humans need technology to stay alive.