Grand Canyon, AZ – During the winter, hospitals brace themselves for flu season. But, during the summer, health care workers at Flagstaff Medical Center get ready for what they call "Grand Canyon Season". It's the time of year when the emergency department becomes flooded with people who've gotten sick or injured at the Canyon. It's a phenomenon that's not only hard on visitors, but also on the people who rescue them. Arizona Public Radio's Gillian Ferris Kohl reports.