Dozens of hikers report illness on trips to waterfalls by Arizona’s Grand Canyon

People camping on Havasupai reservation say they vomited and had fever as health officers look into source of outbreak

Dozens of hikers say they fell ill during trips to a popular Arizona tourist destination that features towering blue-green waterfalls deep in a gorge neighboring Grand Canyon national park.

Madelyn Melchiors, a 32-year-old veterinarian from Kingman, Arizona, said she was vomiting severely Monday evening and had a fever that endured for days after camping on the Havasupai reservation.