So I get that the infrastructure isn't as well in place to deal with things like this but where I live 100+ isn't that absurd, and that's nothing to say for places like Arizonia which is two blocks away from the sun and 90 is considered cool, with 100+ being a common occurrence. So what makes this particularly bad?
The humidity amplifies the effects of the heat. I remember the first time I travelled to Arizona and was expecting to suffer when I saw the forecast temperatures were 100+, but the dry heat was - I hesitate to say comfortable - but very different from a 90 degree day on the East Coast with high humidity. An extended period of extreme heat + humidity can be brutal on the body, particularly those already vulnerable or…
I'm in NY and when it's ~90f degrees out with high humidity, it's an unescapable heat unless you have an A/C.
I'm in ok shape I guess. I walk 3-5 miles a day in all types of weather ranging from about 10f to 100f degrees but when high temps hit with high humidity my skin immediately glazes over and I know to take it easy. My arms will be dripping wet in less than a minute just standing outside doing nothing with a ~60 BPM heart rate.