Some exhausted residents in Fort McMurray who were evacuated from their homes because of raging wildfires are on the move again.
They were forced to evacuate their emergency shelters in a nearby town because of changing weather.
They were put on buses for a trip to Edmonton.
Meantime Alberta has declared a state of emergency as crews frantically battled flames that had already destroyed some 16 hundred homes and other buildings.
Much of the downtown is being protected by the efforts of firefighters and the water treatment plant in the area has been saved but Fort McMurray is under a boil water advisory.