Hurrricane Isaac - Photo Gallery 48/70

A cyclist rides through a flooded street on Tuesday, Aug. 28, 2012, in Bay St. Louis, Miss. The U.S. National Hurricane Center in Miami said Isaac became a Category 1 hurricane Tuesday with winds of 75 mph. It could get stronger by the time it's expected to reach the swampy coast of southeast Louisiana. (AP Photo/John Bazemore) ORG XMIT: MSJB103