Park officials said Pierre Michel Formosa, 68, was found dead after he and a traveling companion left their stuck vehicle to seek help across salt flats as temperatures reached 116 degrees.

A 68-year-old French visitor died after he and a traveling companion became stranded on a remote road in Death Valley National Park and tried to walk for help across salt flats in extreme heat, according to the National Park Service.

Pierre Michel Formosa and his companion were traveling on West Side Road near Queen of Sheba Mine Road on Aug. 17 when their vehicle became stuck in mud, park officials said. With no other vehicles nearby, the two men started walking toward Badwater Road.

Temperatures reached 116 degrees that day. After walking about 1.3 miles, Formosa could not continue, the Park Service said. His companion continued to Badwater Road, received help from a passing motorist and reported the emergency at the Furnace Creek Visitor Center shortly after 2 p.m.

Park rangers and an Inyo County deputy began a search at about 2:13 p.m., later joined by a California Highway Patrol helicopter. Formosa was located that afternoon about 1.5 miles from Badwater Road and was pronounced dead at the scene.

The Inyo County coroner will determine the cause and manner of death. Park officials said Death Valley’s distances, limited cell service and severe summer heat can make emergencies especially dangerous, and advised visitors with disabled vehicles that staying with the vehicle is often the safer option.