You are talking about Minnesota but your description is identical to that of Atlanta, Houston, and any number of other southeastern US cities during the first h

You are talking about Minnesota but your description is identical to that of Atlanta, Houston, and any number of other southeastern US cities during the first half of the 20th century. A/C became widespread in the US first in the South, because it made indoor work possible in the afternoons. During that time (first half of 20th century), Northerners still considered A/C optional because the hot season was relatively short. A/C has been considered non-optional in the American South for the last 50 years. (In fact, I often find that when I visit the South in the summer I need to bring a sweater because it's not uncommon for indoor spaces to be ridiculously cool.) Those days are over. Now Minnesota is like Atlanta in 1950, and Atlanta in the summer is now dangerous. Phoenix in summer is now deadly. A/C is a life-and-death issue in the southern half of the US (unless you're on top of a high mountain). A long absence of A/C in those places will kill you, and I don't mean figuratively.