Louisiana dealing with Isaac aftermath - 13 WTHR Indianapolis

Isaac may have passed through Louisiana, but the storm is still causing concern. Louisiana state officials fear new flooding and hundreds of thousands of people could spend days without power.

In New Orleans, people are returning to their routines but other communities fear the worst may not be over.

Residents in Louisiana and Mississippi are still trudging through streets that look more like rivers.

"They're scared. They're leaving their homes. They don't know if they are going to have a home to go back to," said Sam Kelly, American Red Cross.

Near Slidell, police are hoping the flood waters will drain out by night so crews can start repairing the damage.

"It's still three to four feet deep in the roadway. There's downed trees, downed power lines," said Daniel Susan, Slidell Police.

Thousands near the Louisiana/Mississippi border are still evacuated. They're waiting for officials to intentionally breach the Tangipahoa dam, which is under pressure from the storm.

"The most important thing is protecting people's lives and property," said Gov. Bobby Jindal.

In New Orleans, engineers say the federal levees improved following Hurricane Katrina did their job and protected the city from significant damage.

"There is no doubt in anyone's mind at the Corps that this made an invaluable service," said Ken Holder, Army Corps of Engineers.

Restaurants like the iconic beignets spot Café du Monde are already open. Customer Chuck Floyd Jones says he's not just there for the coffee and beignets.

"Down here has power. One of the reasons I'm down here there is A/C," he said.

Mitt Romney is visiting the damaged areas of Louisiana Friday and President Obama will be there Monday.