Louisiana Governor, Bobby Jindal, said authorities may intentionally breach some of the levees to release the build up of water. He added: the National Guard is on site with ten boats to assist in the search and rescue with unconfirmed reports that between 9 and 40 people need rescuing in the east.
A total of 8,200 of the National Guard are patrolling the area.
A dusk-to-dawn curfew is in force in New Orleans tonight after Hurricane Isaac brought flooding and stranded dozens of people.
With mean winds of 80mph and higher gusts, flooding is the biggest threat as Hurricane Isaac pushes up through Louisiana.
New Orleans has been left with localised flooding and 70% of people are without power as Hurricane Isaac passes up Louisiana.