11 p.m. update: Isaac makes landfall

As of 11 p.m.. EDT, Issac was an 80-mph hurricane ashore on the Louisiana coast near New Orleans.

In its update, the National Hurricane Center warned of flooding in Louisiana, Southern Mississippi, Alabama and parts of the Florida Panhandle from a possible 7 to 14 inches rain expected from the storm. Maximum sustained winds were still at 80 mph. Isaac continued to move northwesterly at 8 mph.

Power was out across parts of Louisiana, Mississippi and Alabama on Tuesday night, with power company Entergy reporting more than 150,000 without power in the New Orleans area alone, McClatchy Newspapers reported. The National Hurricane Center reported a storm surge of eight feet has been reported at a National Ocean Service tide gauge at Shell Beach, La., and 5.3 feet in Waveland, Miss.