Three hikers died of suspected heat-related illnesses in the Grand Canyon’s inner canyon on two separate days as shade temperatures topped 109 degrees Fahrenheit, underscoring the extreme heat risk in the area.

Park and weather officials urge hikers to honestly assess plans and recommend delaying or canceling strenuous daytime hikes to reduce the risk of heat-related harm.

A 67-year-old man and a 68-year-old woman died on June 16 along the North Kaibab Trail before help could reach them.

The bodies have been transported to the Coconino County Medical Examiner’s Office and investigations into the deaths are ongoing.

Investigations into the fatalities continue, with authorities not yet releasing victims’ identities.

Nearby Oak Creek Canyon saw evacuation orders due to the Pocket Fire, highlighting concurrent fire danger as investigations into Grand Canyon fatalities proceed.

Broader heat advisories and extreme heat watches are in effect across multiple states, indicating widespread dangerous temperatures.

The Grand Canyon remained a top destination in 2025, with visitor numbers surpassing 4 million.

The heat wave coincides with global sports events, with discussions about matches played in severe heat and potential delays.

National Weather Service officials say the temperatures are hot for the area but not unusual for the date, stressing the persistent heat risk.

Officials issued heat-avoidance guidance for the park as Western U.S. heat and fire danger rises amid above-average temperatures.

Officials have not publicly released the victims’ identities, and the exact elevation or time of day of the incidents has not been disclosed.