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A boat overturned by Hurricane Isaac floats in lower Plaquemines Parish on September 2, 2012 in Buras, 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

September 4, 2012

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.