Key keywords: Grand Canyon hiker fatality, 18-year-old hiker death, Grand Canyon extreme heat incident, National Park Service heat warning, summer backcountry hiking safety, Arizona high temperature hiking risk, Grand Canyon search and rescue, heat stroke hiking death The National Park Service (NPS) confirmed earlier this week that an 18-year-old hiker, identified as a recent high school graduate from Henderson, Nevada, died while visiting Grand Canyon National Park amid record-breaking high temperatures that topped 114°F (45.6°C) over the weekend. According to official reports, the teen was hiking the popular Bright Angel Trail with two friends on Saturday morning when he began exhibiting symptoms of severe heat exhaustion around 11:30 a.m., when temperatures had already climbed above 108°F. His companions attempted to cool him down with the limited water they had on hand before calling 911, but Grand Canyon search and rescue teams arrived on scene within 20 minutes to find him unresponsive and displaying signs of advanced heat stroke. He was airlifted to the park’s South Rim medical clinic, where he was pronounced dead shortly after arrival. NPS officials noted that the teen’s group had only brought 2 liters of water total for the three of them for what they planned as a 3-mile out-and-back hike, far less than the recommended 1 liter per person per hour for desert hiking in high heat. The park had issued an extreme heat advisory 48 hours before the incident, urging all visitors to avoid hiking exposed trails between 10 a.m. and 4 p.m. during the summer months, wear sun-protective clothing, carry electrolyte drinks in addition to water, and never hike alone. This marks the third heat-related hiking death at Grand Canyon National Park this year, and the 7th across all U.S. national parks in 2024. Family members of the victim released a statement on Tuesday noting that the teen was an avid casual hiker who had planned to study environmental science at Northern Arizona University starting this fall, and that he had underestimated how quickly desert heat can overwhelm even healthy young people. “We are sharing his story in the hopes that no other family has to go through this pain,” the statement read. “Please listen to park warnings, plan ahead, and prioritize safety over checking a hike off your bucket list.” NPS rangers are also reminding visitors that heat stroke can set in in as little as 30 minutes in temperatures above 110°F, even for people in good physical shape, and that anyone experiencing dizziness, nausea, or confusion while hiking should stop immediately, find shade, and hydrate.