(REUTERS)  Alberta is racing to evacuate thousands of people as an uncontrolled wildfire burns near Fort McMurray, in the heart of Canada’s oil sands region, forcing residents to flee north to safety on Tuesday. Alberta appealed for help from other provinces and Ottawa to help fight the fire and airlift people from the city. Local authorities issued a mandatory evacuation order for all of Fort McMurray, which affects the city’s 80,000 residents. The 2,650-hectare (6,540-acre) […]