Oh good grief! Does no one over there own an A/C? In their cars? Besides, 90 degrees? C'mon, people didn't die in the south in those numbers before air conditioning. I don't get it. Do they not know fans and water? It's not like they're working or anything.
It was mainly old people left in their old folks homes while their families went on their famous (and popular) month-long vacations. Came home to find grandmere and grandpere rotting in a makeshift morgue.
It was the smell that killed them, you silly. Millions of sweating Frogs. Ghastly.