It's so hot that a glass of whole milk with ice and a big pinch of salt is almost unbearably blissful. It is not 5 mile run weather. I feel I could drink a lake dry.
Um, I guess the point I'm trying to make is do NOT 'nip' out for a run that you know will be beautiful and seduce you into extra distance if you're not carrying water. I have actual sparkly salt crystals on my face from sweating.