Officials in Canada say the huge wildfire which has devastated the oil town of Fort McMurray in Alberta could double in size over the next 24 hours.

The fire currently covers an area larger than New York City and is being fanned by winds and feeding on dry vegetation.

The flames are now moving away from the town, most of whose inhabitants have now reached safety.

More than 80,000 people were evacuated from the city earlier this week.

Most fled south but many fled north. A land convoy evacuating people from oil worker camps in the north on Friday was suspended after 200ft (60m) flames flanked the road.