Power in the Vancouver downtown core will not be fully restored until at earliest some time Tuesday, following an explosion of an underground transformer that started a fire and sent plumes of smoke up through a manhole cover, BC Hydro said. - Crews were unable to enter the manhole during the day to assess the damage because the air inside was too hot, BC Hydro said Monday night. - Once the air had cooled down significantly in the manhole at Georgia and Pender streets, crew members were to go in for inspection and repair. - BC Hydro didn't know when power would be fully restored in the area, spokeswoman Susan Danard told CBC News. - "It's looking like a significant repair job will be required," she said. "It's turned out to be a larger problem than we had earlier learned of." - The power outage affected the east area of downtown bounded by Water Street, Cordova Street, Burrard Street, Nelson Street and Main Street, BC Hydro officials...