 A couple had to be airlifted from a trail after running out of water near California's Joshua Tree National Park. And three people have died in less than a month while hiking at the Grand Canyon. We really work on advising people to make sure you bring plenty of water. That's Claire Miller, a park supervisor with the city of Phoenix. She also recommends hikers wear loose, light-colored clothing, appropriate shoes, and a hat. Rescues happen regularly on Phoenix's rugged trails, says fire captain Rob McDade. We're here.