A ring of wildfires has erupted around Canada’s unofficial oil-sands capital of Fort McMurray, adding new threats to crude production from the world’s third-largest petroleum reserves.
Eight out-of-control blazes have been discovered just south and southwest of the city since Wednesday, Alberta Wildfire data show. Those add to the three burning to the north, where the region’s main oil-sands mines are located.
A blast of hot, dry weather across Alberta in recent