Hurricane Katrina, Tropical Storm Isaac | featured news

Hurricane Isaac crashed ashore in southeast Louisiana on Tuesday, bringing high winds and soaking rains that pose the first test for multibillion-dollar flood defenses put in place in New Orleans after Hurricane Katrina devastated the U.S. Gulf Coast seven years ago.

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 levees fortified after Katrina struck seven years ago this week.

As the seventh anniversary of Hurricane Katrina's landfall approaches, New Orleans -- and much of the Gulf Coast -- is preparing to put into practice the lessons learned from that defining storm. Tropical Storm Isaac is following a path eerily similar to Katrina's in 2005.