What is the name of the event that closed down John F. Kennedy High School and became one of the costliest and fifth deadliest natural events of its kind?
John F. Kennedy High School (New Orleans):  The school closed down subsequent to Hurricane Katrina in the fall of 2005. Hurricane Katrina: Hurricane Katrina was an extremely destructive and deadly tropical cyclone that was the costliest natural disaster and one of the five deadliest hurricanes in the history of the United States.
Hurricane Katrina