Fats Domino, whose I'm Ready (Let's Have a Party) was recorded by Elton, is a New Orleans resident who was reported to be among the missing in Katrina's aftermath.
Happily, though, according to CNN, his daughter, Karen Domino White, who resides in New Jersey, identified him in a picture taken Monday night by a New Orleans Times-Picayune photographer.
The photograph shows the 77-year-old being helped off a boat near his home in the city's Lower 9th Ward.
His whereabouts since the rescue were not immediately known. Nor was there any information about his wife, Rosemary, friends noted.
The neighborhood was heavily flooded when a levee failed as Katrina slammed into southeastern Louisiana and the Mississippi Gulf Coast.
Thousands are feared dead in the storm, Louisiana's governor and the mayor of New Orleans have stated, although no official tally has been compiled.
Karen said she last heard from her father August 23, four days before the storm hit, and was unable to contact him Sunday.
"I didn't have any information. I was just praying," she said.
Writer Charles Amann said he last spoke to the singer on Sunday, when he refused to join the evacuation that was then under way.
"He said to me, in that wonderful Southern accent of his, that no, he was staying on -- that he had gone through the last one and he could go through this one," recalled Charles, who is working on a book on the early days of the American Bandstand television program.
Many of those evacuated from the Lower 9th Ward were taken to the Louisiana Superdome and are being transferred to the Astrodome sports stadium in Houston, Texas.
Alan Warner, an EMI Music executive, also saw the photo of the performer's rescue. But he said he did not know where the former Antoine Domino was taken afterward.
"But the fact that he actually was rescued is just so gratifying.''