For your information

Chicago has a city wide air siren that they test on the first Tuesday of the month at 10:00 for thirty seconds.

For those of you who, like me, do not live in a city that does this, please note that the testing of the siren (which is louder and more terrifying than a subsonic jet fighter passing through your kitchen) is absolutely no reason to leap out of your hotel bed where you were having a much needed nap, run to the window to look for tornados or the horsemen of the apocalypse while trying to figure out how to seek shelter and bursting into hot, frightened tears because you simply cannot believe that after all of this you are going to be killed in Chicago.

That will be all.