The National Park Service confirmed that three people died from heat-related illnesses in two separate incidents last week at Grand Canyon National Park.
Officials said both incidents involved hikers found on trails within the park. The first death occurred June 12 and involved a 72-year-old man who died due to extreme heat along the South Kaibab Trail. The second incident involved a 67-year-old man and a 68-year-old woman on the North Kaibab Trail.
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The National Park Service said rescue efforts were underway before the hikers died.
According to park officials, daytime temperatures can exceed 109 degrees in shaded parts of some trails in June. The National Weather Service reported a high temperature of 88 degrees on June 12 and 90 degrees on June 16 at a nearby weather station.
Park rangers advise visitors to avoid hiking between 10 a.m. and 4 p.m. in the summer due to dangerous temperatures.
“Hiking up the South Kaibab Trail during the summer months is extremely strenuous and potentially dangerous due to intense heat, minimal shade and no water sources,” the park service said in a statement. “Similarly, the Tonto Trail between The Tipoff and Havasupai Gardens offers no water and very limited shade.”
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From 2007 through 2025, there have been 227 deaths reported at the national park, according to park data.
Ange_the_Avian on June 20th, 2026 at 13:55 UTC »
My brother and I visited GCNP a few years ago, very early in the morning - 630 AM or so. We wanted to hike down to Phantom Ranch and back and quickly realized that wasn't going to happen. The heat, the switchbacks, almost no shade really, etc. is a deadly combination and we were somewhat experienced hikers in our 20s. These deaths seemed really preventable if they took any kind of precautions.
CFCYYZ on June 20th, 2026 at 13:23 UTC »
At the South Rim head of the Bright Angel Trail, a large sign warns hikers to carry enough water or die. There is a picture of one victim, who is described as a marathon runner, alpinist and adventurer in her 30's If someone like that can die, normal folks can too. Water is survival and Canyon heat will kill.
Inquisitive-Sky on June 20th, 2026 at 13:20 UTC »
There's a reason NPS warns you not to hike into the grand canyon between 10am and 4pm during summer. And why NWS is out there issuing extreme heat watches and warnings.