A 14-year-old boy died after hiking with his stepfather and brother in extreme heat at Big Bend National Park in Texas on Friday. The stepfather died in a car crash after he hiked back to their vehicle to seek help, officials said.

The park’s communications center received a call at around 6 p.m. local time requesting emergency assistance along the Marufo Vega Trail, park officials said in a news release Saturday. 

“Temperatures at the time were 119 (degrees),” park officials said in the release. 

The 14-year-old boy fell ill along the trail and lost consciousness, park officials said. His stepfather, 31, hiked back to their vehicle to find help while the brother, 21, tried to carry his brother back to the trailhead.