It wasn’t anything exotic like a methane pocket or toxin. They just got in over their heads hiking on a hot day.

A family of three found dead on a Northern California hiking trail in August died of heat exposure and possible dehydration, the local sheriff’s office revealed Thursday.

“Heat-related deaths are extremely difficult to investigate,” Mariposa County Sheriff Jeremy Briese said at a press conference, citing an official cause of death of “hyperthermia and probably dehydration.”

California Officials Reveal How Hiking Family Mysteriously Dropped Dead (The Daily Beast)