Texas hiker dies on trail at Grand Canyon National Park; officials warn of extreme heat

A hiker collapsed and died on a trail in Grand Canyon National Park in Arizona over the weekend, prompting parks officials to warn about the dangers of hiking in extreme heat.

Scott Sims, 69, of Austin, Texas, was attempting to reach Phantom Ranch via the South Kaibab Trail for an overnight stay when he was found semi-conscious around 7 p.m. Saturday, the National Parks Service (NPS) said in a statement on Monday.

Sims became unresponsive a short time later, and bystanders performed CPR until three NPS paramedics arrived...