Isaac approaches hurricane status, threatens to flood coast

Tuesday, August 28, 2012 | 7:26 a.m. CDT; updated 10:44 a.m. CDT, Tuesday, August 28, 2012

CHAUVIN, La. — Isaac was on the verge of ballooning into a hurricane Tuesday that could flood the coasts of four states with storm surge and heavy rains on its way to New Orleans, where residents hunkered down behind levies fortified after Katrina struck seven years ago this week.

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