On August 26, tracks which had previously indicated the hurricane was heading towards the Florida Panhandle shifted westward, initially centering on Gulfport/Biloxi, Mississippi and later shifted further westward to the Mississippi/Louisiana state line. The city became aware that a major hurricane hit was possible and issued voluntary evacuations on Saturday, August 27. Interstate 10 in New Orleans East and Jefferson and St. Charles parishes was converted to all-outbound lanes heading out of the city as well as Interstates 55 and 59 in the surrounding area, a maneuver known as "contraflow."