NEW ORLEANS AP - 1 minute ago -- Thousands more bedraggled refugees were bused and airlifted to salvation, leaving the heart of New Orleans to the dead and dying, the elderly and frail stranded too many days without food, water or medical care.

No one knows how many were killed by Hurricane Katrina's floods and how many more succumbed waiting to be rescued. But the bodies are everywhere: hidden in attics, floating among the ruined city, crumpled on wheelchairs, abandoned on highways.

And the dying goes on -- at the convention center and an airport triage center, where bodies were kept in a refrigerated truck.

Gov. Kathleen Blanco said that she expected the death toll to reach the thousands. And Craig Vanderwagen, rear admiral of the U.S. Public Health Service, said one morgue alone, at a St. Gabriel prison, expected 1,000 to 2,000 bodies.

[...] Nearby, a woman lay dead in a wheelchair on the front steps. A man was covered in a black drape with a dry line of blood running to the gutter, where it had pooled. Another had lain on a chaise lounge for four days, his stocking feet peeking out from under a quilt.

By mid-afternoon, only pockets of stragglers remained in the streets around the convention center, and New Orleans paramedics began carting away the dead.

A once-vibrant city of 480,000 people, overtaken just days ago by floods, looting, rape and arson, was now an empty, sodden tomb. The exact number of dead won't be known for some time. Survivors were still being plucked from roofs and shattered highways across the city.

"There are people in apartments and hotels that you didn't know were there," Army Brig. Gen. Mark Graham said.

The overwhelming majority of those stranded in the post-Katrina chaos were those without the resources to escape -- and, overwhelmingly, they were black.