While the Northshore cleans up tornado damage and crews work to restore power, the south shore dealt primarily with flooding caused by sustained, torrential downpour.
Officials are reviewing to see what can be done better.
Jefferson Parish Emergency Management Director Joe Valiente says it's hard to understate just how much rain fell in a short period of time.
"It was just the volume. Our records show within about eight-and-a-half inches of rain in six hours," Valiente told WWL's Tommy Tucker.
New Orleans Homeland Security and Emergency Preparedness Director Collin Arnold says they clocked rainfall at five to six inches in an hour.
"There isn't a system designed that can keep up with that," he said.
New Orleans Sewerage & Water Board reported more than 92 percent of its pumps working, and could generate 92 percent of the power needed at peak demand.
"They had 40 megawatts of power, and ideally, to run everything at one time, they need 44 megawatts," said Arnold.
