Isaac prompts hurricane warnings from La. to Fla.
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Credit: Getty Images
ST. PETERSBURG, FL - AUGUST 26: A beach closure sign stands along the waterfront ahead of Tropical Storm Issac on August 26, 2012 in St. Petersburg, Florida. The RNC is scheduled to convene on August 27 and will hold its first full-day session on August 28 as Tropical Storm Isaac threatens disruptions due to its proximity to the Florida peninsula. (Photo by Tom Pennington/Getty Images)
