FEMA abruptly closed down a site housing Hurricane Katrina victims Sunday because of health and safety concerns, and its weary residents said they were being left in the lurch once again since losing everything in the storm. A 48-hour deadline to leave fell on Sunday night, and FEMA scrambled to find new places for the 58 households. Although many residents said they would have been happy to keep on living there, the Federal Emergency Management Agency determined it was too risky because of ongoing problems with raw sewage and periodic power outages. "They know how to put me out, but...