Call client. See if they're still alive. If you reach them, tell them you're calling back to see if they're alive, and if the house has burned down, because that's how serious this is.
Tell them something is very dangerous in their house and they NEED to call an electrician.
A good answer is easier with a clear question giving the make and model of everything. "The biggest problem in communication is the illusion that it has taken place." -- G. “Bernie” Shaw
