This means Chicago tests the tornado sirens. It happens every month. I forget every month. Every first Tuesday of the month I hear this, without knowing what the fuck is going on, before I remember 2 minutes later:
Let it be known she has plenty of comfy places to hide, she chose to sit there and be scared
I had seen a video of this before, but I wasn't convinced it was real. And now I'm finding out not only is it real, but this is a monthly occurrence people just live with???