St. Louis Post-Dispatch
By CAIN BURDEAU and MICHAEL KUNZELMAN Associated Press, August 31, 2012

Interstate 10 is seen partially submerged by floodwaters from Isaac in LaPlace, La., Thursday, Aug. 30, 2012. Isaac soaked Louisiana for yet another day, flooding homes and forcing last-minute evacuations and rescues. New Orleans itself was spared, thanks in large part to a levee system built after Katrina. (AP Photo/Gerald Herbert)
NEW ORLEANS • Isaac hovered over Louisiana for a third day Thursday, shedding more than a foot of additional rain that forced authorities to hurriedly evacuate areas ahead of the storm and rescue hundreds of people who could not escape as the rapidly rising water swallowed entire neighborhoods.
The huge spiral weather system weakened to a tropical depression as it crawled inland, but it caught many places off guard by following a meandering, unpredictable path. The storm's excruciatingly slow movement meant that Isaac practically parked over low-lying towns and threw off great sheets of water for hours.
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