NEW ORLEANS, LA - MAY 9  Musicians perform in the French Quarter on May 9, 2015 in New Orleans, Louisiana. The tenth anniversary of Hurricane Katrina, which killed at least 1836 and is considered the costliest natural disaster in U.S. history, is August 29. Around 80 percent of the city flooded in the aftermath of the storm.  (Photo by Mario Tama/Getty Images)