3 elderly hikers die on Grand Canyon's inner trails as temperature spiked to 109 degrees

3 elderly hikers die on Grand Canyon's inner trails as temperature spiked to 109 degrees CBS News 3 Hikers Die at Grand Canyon Amid ‘Dangerous’ High Temperatures The New York Times Grand Canyon on ‘extreme heat’ watch, with temperatures set to soar The Guardian 3 people suffer heat-related deaths in a week's span while hiking Grand Canyon trail FOX Weather Grand Canyon National Park Warns Hikers to Avoid the Inner Canyon Between 10 a.m. and 4 p.m. National Park Service (.gov)