is faster than san juan traffic will allow. but the day's first sandwich delivery is ready, bound for the doctors and nurses at the university of puerto rico hospital. >> thanks, chef. >> all right, here we go. >> reporter: we race across town and as we arrive at a place where an emergency room is full and generators are nearly empty. there is a stark reminder of why they're all working with such urgency. just as the nourishment is wheeled in, a victim of maria's brutal aftermath is wheeled out. reminder of such horror that is still playing out across most of the island. pitbull, the celebrity singer sent a private jet down here to evacuate cancer patients, but, you know, singers and chefs can only do so much. this is a humanitarian crisis on the biggest scale we've seen in