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0830 hurricane 34

Matt Landry of St. Bernard Parish, center, and Jeff Sancho, with the Air National Guard, right, assist Sharon Sylvia, who is diabetic, into a vehicle as Isaac moves through New Orleans Wednesday, Aug. 28, 2012. (AP Photo/The Times-Picayune, Chris Granger) MAGS OUT; NO SALES; USA TODAY OUT

Gallery: More photos from Hurricane Isaac

Aug. 30, 2012 @ 11:37 AM

Hurricane Isaac poured unrelenting rain Thursday, flooding areas north and south of New Orleans even as the city's fortified defenses held and forcing officials to launch speedy evacuation and rescue efforts in the face of fast-rising waters.