In Louisiana, the storm flooded New Orleans, leading to confusion, chaos and medical emergencies. Dr. Oz traveled with The Oprah Show to the front lines, where he witnessed scenes he'll never forget.
Watch Dr. Oz report from New Orleans.
First, Dr. Oz went to the New Orleans International Airport, which was being used as a makeshift morgue and medical center. "I've been a doctor for 20 years. I've dealt with a lot of trauma. Nothing has prepared me for this," he said. "I had always thought that I would do Third World care. I just never thought I'd be practicing in a tent in my own country."