New Orleans residents are facing a dusk-to-dawn curfew as Tropical Storm Isaac continues to drench the Crescent City.
Mayor Mitch Landrieu issued the curfew as Isaac lashed the city on the seven-year anniversary of Hurricane Katrina.
Police cars have been patrolling nearly empty streets since the storm arrived. The curfew is set to begin Wednesday night and last until further notice.
The storm weakened Wednesday from a hurricane, as its winds dropped below 74 miles an hour.
Meanwhile Louisiana Gov. Bobby Jindal says officials may have to breach a levee on the east bank of Plaquemines Parish to relieve pressure on the structure. He said as many as 40 people are reportedly in need of rescue in the area.
The parish has also ordered a mandatory evacuation for part of the west bank of the Mississippi River because of worries of a storm surge. The order affects about 3,000 people in the area, including a nursing home with 112 residents.
More than 600,000 households and businesses are without power.
Forecasters say Isaac's slow motion over land could make it a major soaker, dumping up to 20 inches of rain in some areas.