The park has not released a cause of Martinez’s death, but notes that temperatures in the inner canyon on Sunday were well over 100 degrees. At Phantom Ranch, at the bottom of the Grand Canyon, temperatures reached highs of around 115 degrees.
According to the Park Service, Martinez died about a mile (1 mile) from the confluence of Tapeet’s Creek and the Colorado River. Her death is being investigated by the Park Service and the Coconino County coroner.
“Grand Canyon National Park park rangers urge visitors to the Grand Canyon, especially hikers and backpackers in the inner canyon, to prepare for the extremely hot days ahead in the coming weeks.
Temperatures on the exposed parts of the trail can reach over 120 degrees in the shade during the summer months. Park rangers warn people not to hike the Inner He Canyon during peak heat hours between 10am and 4pm.
“Hiking in extreme heat can lead to serious health risks including heat stroke, heat stroke, hyponatremia and death,” the release states.