Back in 1995, Chicago had a streak of very hot weather around the start of July, and a bunch of people died from the heat, quite of a few of them old people who died in their apartments.
In the typical case, the person had no a/c, and had sealed up their windows, and had stayed in their apartment, perhaps because they lived in tough neighborhoods.
Well, we're having a record hot spell this year, but so far I haven't heard of a high number of such heat deaths. I know programs were put in place to try to prevent this from happening - including programs where neighbors check on old people in their neighborhoods on hot days. Also, "cooling centers" were designated and announced - you know, public places with air conditioning.
I'm hoping this July