I'm so glad that no one was hurt!! It could have been tragic!
I have my iron plugged into an outlet that is attached to the switch on the wall. It is the kind of outlets that people use to have a table lamp that can be turned on and off with the wall switch. (I hope I'm explaining this well.) A lamp is also plugged into the same outlet, so when I flip the wall switch to 'off', both the lamp and the iron are off, because the outlet does not have any current running to it. (I know there must be an easier way to explain this, but I'm just a little old lady!)