He didn't "fall in," he jumped in, to save his dog. People were screaming at him not to jump.
When he was being hauled out (his rescuer was severely burned too) he said "That was stupid. How bad am I? That was a stupid thing I did.”
He died the next day, in a hospital.
Sad case. It was to try to save his dog ... Yes, I know, it’s only a animal, but for many of us, a pet is a most dear friend.