Bright Angel Trail begins its descent into the canyon from Grand Canyon Village. (National Park Service photo)

LAS VEGAS (KLAS) — A third hiker has died in the Grand Canyon in less than a month.

A 50-year-old man from San Angelo, Texas, was found unconscious about 100 feet below the Bright Angel Trailhead on Sunday, according to a news release from the National Park Service (NPS). The call was received by the Grand Canyon Regional Communications Center around 2 p.m. The man's name has not been released.

On June 16, a 41-year-old man died at the bottom of the canyon after beginning a hike on the same trail, and on June 29, a 69-year-old man from Texas died after being found unconscious on the River Trail at the bottom of the canyon.

Passersby and medical personnel responded to Sunday's incident, but efforts to resuscitate the hiker were unsuccessful.

The National Park Service said the man had been trying to reach the rim after spending the night at Havasupai Gardens.

The investigation into this incident is being conducted by the National Park Service in conjunction with the Coconino County Coroner. There is no additional information at this time.

The Grand Canyon website currently states that an extreme heat warning is in effect from 12:25pm today through 8pm Mountain Time on July 12. Dangerous heat is expected for areas below 4,000 feet elevation, with daytime temperatures reaching 109°F at Havasupai Gardens and 115°F at Phantom Ranch.

“Day hikers on Bright Angel Trail should not descend more than 1.5 miles from the upper trailhead. Between 10 a.m. and 4 p.m., hikers should exit the canyon or remain at Havasupai Gardens or Bright Angel Campground. Physical activity should be limited. All hikers should be equipped with proper gear, including a wide-brimmed hat, sunscreen, salted snacks, plenty of water, and an electrolyte mix. Doubling your calorie intake will help maintain your energy.” The website advises.