An investigator walks through the debris from a home explosion which occurred the day before in Plum, Pa., Aug. 13, 2023. Authorities say the owners of the home were having issues with their hot water tank. But the cause of the blast that killed five people — including two municipal officials — remains under investigation. The explosion in Plum destroyed three structures and damaged at least a dozen others. (Lucy Schaly/Pittsburgh Post-Gazette via AP, file)

PLUM, Pa. (AP) — The co-owner of a home that exploded in western Pennsylvania last weekend has died from injuries he suffered in the blast, which also killed his wife and four other people. Fifty-six-year-old Paul Oravitz died Wednesday in a Pittsburgh hospital, four days after the explosion in Plum. He had had severe burns over most of his body from the blast. The town is about 20 miles (32 kilometers) east of Pittsburgh. The cause of the explosion remains under investigation, but officials have said Oravitz and his wife, Heather, were having issues with their hot water tank.