` It 's not rocket science , '' McCartney says . Katrina left St. Bernard Parish , once home to 67,000 , virtually uninhabitable . The storm surge from the Mississippi River flooded homes and businesses in New Orleans, leaving many people homeless for weeks or months after it hit. She and her boyfriend started St. Bernard Project , focusing on seniors , families .
Katrina left St. Bernard Parish , once home to 67,000 , virtually uninhabitable . The storm surge from the Mississippi River flooded homes and businesses in New Orleans, leaving many people homeless for weeks or months after it hit. She and her boyfriend started St. Bernard Project , focusing on seniors , families .