Officials believe that excessive heat exposure played a role in the death of a Mississippi man who was found lying in his backyard Tuesday.

WTVA in Tupelo reports that a passerby found 86-year-old Theodis Stevenson lying in his Lowndes County yard on Tuesday and called 911 to report his discovery.

After emergency responders arrived at Stevenson’s residence, Stevenson was transported to the hospital, where he was treated for hyperthermia and a leg fracture.

Stevenson later died at the hospital that night.

Officials believe that Stevenson fell in his yard Tuesday morning, broke his hip, and fell victim to the heat exposure and sun.