Strange Clouds

This morning I had a difficult time waking up because it was so dark outside. I checked my Facebook feed when I woke up as I usually do and I saw a bunch of my friends posting pictures of the sky. I decided to get up on my roof and see what it was all about. We've been having very hot weather here in Chicago. Yesterday it was supposed to be 98 degrees and it ended up being around 108 degrees.. I stayed inside all day knowing this. Here are a few of the images I took this morning before it started to pour.