I moved to Colorado in 1973. Lived there 49 years. Watched all of it happen. You should see what happened to my tiny home town in Florida. People forget that this is all over the world. There is no place this isn't happening, because, duh, population growth and climate change. It doesn't take a huge amount of basic research to understand these movements, as all early tribes moved when climates changed, drought killed them off or whatever. It's our nature.