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

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.

She eventually hiked out to her car in a weakened state through stiflingly hot weather and was thankful a mule…