I was talking with somebody about the great Chicago fire and I said “what do you want to bet the Jewish population grew in the area just before the fire?” So I search DuckDuckGo and find the (((Wiki))) page for Jewish population in Chicago, is it the history section, and sure enough, not only did a massive influx of Jews arrive during the middle of the century, but also all of the Jews moved from downtown to the Lakeshore after the fire.

I haven’t taken the time to dig deeper, but I feel like this is a lead worth exploring.