A massive wildfire raging in Canada's oil sands capital has moved into Alberta's neighboring province of Saskatchewan, but officials hope cooler temperatures and rain forecast for the coming days will help mitigate its spread.

Thursday's news of the fire's spread into comes a day after officials said that the more than 80,000 residents who were forced to evacuate Fort McMurray and surrounding regions two weeks ago could return home starting on June 1 if conditions are deemed to be safe.

Alberta senior wildlife manager Chad Morrison said Thursday that the fire has grown to 1,930 square miles (5,000 square kilometers) but is moving away from oil sands facilities in northern Alberta.

Morrison says the blaze has burned the same amount of forest as all fires consumed in Alberta last year.