On this date in 1953, Palestine, Illinois was 104 degrees, 30 degrees warmer than today. They had four 100 degree days during September, 1953. Palestine, IL hasn’t had a 100 degree day in September since 1991.
One hundred days there were common prior to 1960, but they almost never happen before.
One of the primary functions of both NASA and NOAA is to make America’s hot past disappear.