The U-S Army Corps of Engineers says most of New Orleans could be drained within a month.
In the meantime, crews continue to clear away mounds of trash left behind by residents fleeing Hurricane Katrina. Dump trucks are hauling away debris from the convention center. And tow truck drivers have started picking up scores of abandoned cars littering the streets.
Power and other utilities remain out in most of the affected region.
Officials trying to identify remains are working around the clock at a field morgue, as forensic workers and cadaver dogs continue to scour the city for corpses.
Thousands of residents continue to defy orders to leave the city, but security forces are not forcing anyone to go.