(KSL News) -- Two Park City residents and their three dogs escaped an early morning fire and explosion in their home.

Park City firefighters got the call just before 4:00 this morning. On the way, the were told there was an explosion inside the home and a fire in the laundry room.

Most of the fire was put out by a home fire sprinkler system.

No word yet on what caused the explosion.

Fire crews say damage to the home was fairly substantial.

Residential sprinklers good or bad? That is my question. I know the answer.