The upper midwest has some of the widest variations in weather in the world... from season to season and from year to year.
I've seen picture and picture from the 1930s that show people swimming in the oppressive heat on vast beaches that are actually lakebed.
But by the 1990s the infrastructure the CCC and WPA built around the lake my hometown sits on was crumbling into the lake as they had built it in an era of lower lake levels. Fields that my grandpa walked to school through in the late 1930s were bogs when I was a kid and by high school the water got deep enough that it became a very large pond or small lake.
Devil's Lake in North Dakota is the best example. It went from a level of 35 to 40 feet deep before 1890 down to nearly disappearing at 10 feet by 1940. It rose to fairly static levels through the 40s-60s and rose some in the 70s/80s but the stable levels lulled people into thinking it was permanent and houses and resorts were built around the lake. Then 1993 happened and the lake rose 18 feet in one year and then kept rising to nearly 55 feet deep.. nearly the deepest level of the past 2000 years.
They keep building up the roads and abandoning others and raising and widening the dams and dikes.
https://www.youtube.com/watch?v=jmyEkbrVDJYhttps://www.youtube.com/watch?v=L3HCbdExcCcIt's really fascinating. You just can't build infrastructure to handle it all in this region of the country.