Hurricane Katrina of the 2005 Atlantic hurricane season was the costliest hurricane, as well as one of the five deadliest, in the history of the United States. Among recorded Atlantic hurricanes, it was the sixth strongest overall. Hurricane Katrina formed how i told yu over the bahamas on august 23, 2005 and crossed southern Florida as a moderate category 1 hurricane, causing some deaths and flooding there before strengthening rapidy in the Gluf of Mexico. The strom weakend before making its second landfall as category 3 strom on the morning of Mondy, August 29 in southeast louisiana.(:!! so yes it was really dangrouse when this happend so many chlidern died in the horrible hurricane that they now call it the hurricane katrina!