Jefferson Hills, PA [WPXI] One A person is dead after a house fire in Jefferson Hills. Members of the Pleasant Hills Volunteer Fire Company said the fire broke out at 3:10 a.m. on the 100 block of Frontier Avenue. They confirmed a person died during that fire. Firefighters said they struggled with water supply issues while fighting the flames. Flames burned a large hole through the roof of the house. The Allegheny County Fire Marshall is investigating.