SAN ANTONIO—Police believe heat may have played a role in the deaths of 82-year-old identical twin sisters in San Antonio.

The bodies of the women were found in their home Thursday morning. Authorities said no one had heard from the women since June 26. A neighbor called police after noticing a foul odor and flies around the windows.

The single window air conditioner in the home was off, officers said. Neighbors told the San Antonio Express-News that the women lived on a fixed income and weren’t likely to spend money on cooling the home.

One woman was found lying on a couch and the other was in a rocking chair.