delta is looking beyond. 80 thousand of us investing billions... in everything from the best experiences below... to the finest comforts above. we're not simply saluting history... we're making it. >>> welcome back. rescuers in colorado working to help hundreds of people stranded in communities cut off by the devastating flooding there. the national guard says the air rescues currently happening in colorado may be the largest evacuations in the country since hurricane katrina. there's one bit of good news. the number of people unaccounted for continues to drop, and most of the people on that list are probably alive but just have no way to get in touch with authorities. the death toll was also revised downward to six. however, as kim law reports now, the damage is epic. >> reporter: just days ago, this was a desirable place to live, a small creek lined with homes and walkways now a raging waterway. >> just listen to whistle signals. i'll tell you. i'm going to watch the river and make sure nothing comes down at us. >> this is actually not the river, either. this is the street. >> reporter: door by door, fema task force teams look for those who rode out the storm in this flooded canyon neighborhood and warn them that i