This sounds like a bad situation. Again, don't fire warning shots or try to scare the intruder. If you are in danger and have a target, shoot. If not, chill and call the Police.
Ex-wife: Homeowner was trying to ward off intruder when fatally shot by police | Pittsburgh Post-Gazette
Ex-wife: Homeowner was trying to ward off intruder when fatally shot by police | Pittsburgh Post-Gazette