Nuclear.

Dream: I had noticed that the clouds look unusual but my friends dismissed it. Seconds later the shockwave hit throwing us all to the ground. A nuclear weapon detonated north of us. They tried to explain it away, saying maybe it was a gas explosion but they soon realized that the EMP knocked out our phones. We scrambled inside and shut the doors, taped the windows shut. Several minutes later clouds resembling burned cotton candy hovered overhead. With communications down all we could do was sit and wait. The dream continued like this for what seemed like hours. The dream ended with all of us having to take these old ferries to NYC. When we arrived On Manhattan there was nothing but JCPenny sales racks. It was bizarro.