Never watch Game of Thrones again! That was definetly the cause of the fire.
This is one of the only instances a disaster has happened when you were home and able to react usually its when your 2000 miles away on vacation. Lucky it didn't catch and put itself out.
Could it be result of a faulty powerbar, I know lots of Powerbars state on them not for aquarium use? How old was the PB?