NEW : An evacuation center has been set up . The city of New Orleans is under a mandatory evacuation. The fire is about two miles from San Francisco International Airport . Helicopters are dropping retardant on houses to stop its spread .
NEW : An evacuation center has been set up . Hospital officials say patients have arrived with burn injuries . The fire is about two miles from San Francisco International Airport . Helicopters are dropping retardant on houses to stop its spread .