Environment & Energy

Heat index is familiar, but intended for temperature ranges which are merely uncomfortable, not dangerous.

There were US deaths last summer from people who ignored the hazards of heat, e.g. hiking in the desert. It will take some time and effort, but education to indices like the global wet bulb (which includes things like radiant heat sources) will help people, now that lethal heat is becoming more common.

Unfortunately, much of the world does not have the wealth or resources for things like air conditioning, or even fresh cool water. I worked in some extremely hot environments when I was much younger. I appreciate how dangerous that would be to me now in my dotage. I get heat cramps very easily. A significant portion of the population in regions prone to heat catastrophe will suffer greatly when conditions get even close to official danger points.