When I was a kid we lived in south unincorporated Naperville. It was mostly flat farmland, so tornado warnings & sirens were pretty common. Weather tracking was not as sophisticated, so when that siren went off, it meant RUN for shelter.
The sirens here are mostly for severe T-storms or the monthly emergency system test. I think this was only the 3rd or 4th time in 24 years that we had to take shelter in our basement.
The path of last night's tornado was so unusual. Not only did it hit densely populated areas but it came so close to us. We have no real damage on our block. My tarps were still in place, a couple plastic chairs fell over, and a few small dead tree branches. Our only casualty was a single tomato plant. Yet, some homes were severely damaged a few miles away. 75th street is only 2.5 miles south of here.