In by email from the Coast Guard:

Emergency Phone Numbers for People in Distress

The Coast Guard strongly urges people in distress in the New Orleans area contact the search and rescue emergency line for the State Office of Emergency Preparedness in Baton Rouge, La.
The emergency numbers are as follows:
(225) 925-7708
(225) 925-7709
(225) 925-3511
(225) 925-7412

To inquiry about family and friends that did not evacuate the Greater New Orleans area contact the American Red Cross at the following number:
(866) 438-4636