A convoy of evacuees drive past wildfires that are still burning out of control south of Fort McMurray, Alta., on Saturday, May 7, 2016. THE CANADIAN PRESS/Ryan RemiorzFirefighters from Ontario are briefed prior to heading into Fort McMurray, Alta., south of the city on highway 63, on Saturday, May 7, 2016. THE CANADIAN PRESS/Jonathan HaywardA convoy of evacuees drive past wildfires that are still burning out of control south of Fort McMurray, Alta., on Saturday, May 7, 2016. THE CANADIAN PRESS/Ryan RemiorzA helicopter helping with the Fort McMurray wildfires takes off from a staging base near Conklin, Alta., Saturday, May 7, 2016.THE CANADIAN PRESS/Jeff McIntoshA flock of geese fly through smoke from the Fort McMurray wildfires above a helicopter staging base near Conklin, Alta., Saturday, May 7, 2016.THE CANADIAN PRESS/Jeff McIntoshThe northern lights shine above the glow from a wildfire on highway 63 south of Fort McMurray, Alta., on Friday, May 6, 2016. THE CANADIAN PRESS/Jonathan HaywardRCMP cars and officers man a checkpoint on the highway to Fort McMurray, Alberta as wildfires are still burning out of control Friday, May 6, 2016.THE CANADIAN PRESS/Ryan RemiorzA RCMP helicopter flies past a wild fire 30km south of Fort McMurray, Alberta on highway 63 Friday, May 6, 2016. Officials said shifting winds were giving the embattled northern Alberta city a break, but they added the fire that forced 80,000 people from their homes remained out of control and was likely to burn for weeks.THE CANADIAN PRESS/Jonathan HaywardAnimal rescue workers wait to get entry to Fort McMurray, Alta., on Friday, May 6, 2016. Officials said shifting winds were giving the embattled northern Alberta city a break, but they added the fire that forced 80,000 people from their homes remained out of control and was likely to burn for weeks. THE CANADIAN PRESS/Jason Franson