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A boat displaced by Hurricane Isaac sits on the edge of a road in lower Plaquemines Parish on September 2, 2012 in Venice, Louisiana. Today was the first day some residents of lower Plaquemines were allowed to return to assess damage to their homes. (Photo by Mario Tama/Getty Images)

Isaac's aftermath

Tens of thousands of customers remained in the dark on Sept. 3 in Louisiana and Mississippi, nearly a week after Isaac inundated the Gulf Coast with a deluge that still has some low-lying areas under water.