Alberta wildfire intensifies as evacuees forced to retrace their steps
- Hot and dry weather fuels flames in oil town of Fort McMurray
- Evacuees cut off after heading north travel back through town
- In pictures: wildfires leave Fort McMurray charred and desolate
A raging wildfire that forced the evacuation of the Alberta oil town of Fort McMurray intensified on Saturday, helped by hot and dry weather. Police escorted a fresh convoy of evacuees out of the region.
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