The 57-year-old woman was trying an 8-mile hike. Park officials again warned the public of the danger of extreme heat at the attraction.
A 57-year-old woman died while on an 8-mile hike in Grand Canyon National Park on Sunday, a day when temperatures topped 100 degrees, park officials said.
Park rangers got a call about a hiker in distress at 6:30 p.m., and when the woman was found in a remote area of the park at 1 a.m. she was dead, the National Park Service said in a statement.
She was on an 8-mile hike in the Tuweep area, which is described as a remote region.
The heat was well over 100 degrees Sunday. A cause of death is under investigation, but the park in a statement Monday warned of the dangers of extreme heat.
A large part of the southwest, including the Grand Canyon area, was under an excessive heat warning Monday. Temperatures in Phantom Ranch were at 114 degrees, the National Weather Service said.
The Grand Canyon is under the excessive heat warning until 8 p.m. Wednesday.
On Monday heat warnings covered parts of the Southwest, in California, southern Nevada and Arizona, according to the weather service.
Heat can be deadly on hikes, and heat-related deaths are the most common cause of death due to weather in the United States, the U.S. Environmental Protection Agency and others warn. An average of 702 deaths are from heat-related illnesses each year, according to the Centers for Disease Control and Prevention.
In June, a 14-year-old and his stepfather died as they hiked in Big Bend National Park in Texas, on a day in which temperatures were 119 degrees. The boy fell ill, and his stepfather died after crashing his car trying to get him help, park officials said.