Transit workers assist passengers in a subway tunnel on the Upper West Side of Manhattan.
Vehicles and pedestrians crowd the Brooklyn Bridge.
(CNN) -- Power is returning to dozens of cities in Canada and the Northeast and Midwest of the United States after they were hit simultaneously Thursday afternoon by a major power outage. Here is a glance of current conditions:
NEW YORK: Lights in Manhattan's financial district began flickering on Friday morning just in time for the opening bell on Wall Street. Times Square, for many the glittering symbol of New York, sprang back to life at about 7:45 a.m. ET. Long Island and parts of four New York boroughs were the only areas still without power Friday morning, and Bloomberg said he expected to city to be fully restored "by late in the day." Subways were not expected to operate and traffic lights were expected to work sporadically.
NEW JERSEY: At the blackout's peak, more than 1 million homes and businesses in New Jersey were without power, but only 50,000 remained in the dark by 5:30 a.m. Friday. Power was expected to be fully restored later in the day. Gov. James E. McGreevey declared a state of emergency, mobilizing 700 National Guard members and 300 extra state troopers. Northern New Jersey commuter railroads and buses had limited to full service Friday.
OHIO: The blackout left 1.4 million FirstEnergy customers without power at its peak. About 450,000 customers -- most around Cleveland -- were still without power early Friday. Cleveland residents should have water by noon Friday, but must boil it four minutes for the next 24 hours before it's safe to drink. Electricity also should be restored 100 percent by early afternoon.
MICHIGAN: It might be late Sunday before power is restored to all of Detroit Edison's 2.1 million customers, Michigan Gov. Jennifer Granholm said. The power outage also affected water supplies because water in the state is distributed by electric pumps. By early Friday, Detroit Metropolitan Airport remained shut down, with about 1,500 passengers stranded in a terminal. An airport spokesman said it was unclear when the airport would begin to function normally. Some areas of Saginaw and Bay City were also suffering from power outages.
CONNECTICUT: About two-thirds of Connecticut's power customers were back on line early Friday. As of 1:30 a.m., 100,000 customers were without power, but mainly in an area concentrated in the southwestern corner of the state, bordering New York. At the peak of the outage, the number was about 300,000. Officials expect nearly 100 percent restoration by early afternoon. According to the emergency management office, the state's power grid remains intact, but individual breakers will have to be tripped at substations to reset the power.
PENNSYLVANIA: Pennsylvania said Friday afternoon that the 100,000 customers in that state who lost their power have had their electricity restored. Among the counties affected in the northwestern part of the state were Erie, Crawford, Venango, Warren, Forest and Clarion.
MASSACHUSETTS: State officials and power suppliers reported scattered outages but Massachusetts was spared the worst of the blackout. Gov. Mitt Romney said that's because the state's power grid operates independently from New York's. "We're asking our citizens to continue using power as they normally would," Romney said.
VERMONT: A quick shutdown of transmission lines from New York averted major outages in Vermont. A small section of northern Vermont near the Canadian border lost power briefly, but it only affected a few thousand customers. Richard Thompson, the Swanton town administrator, said it was "no different than a winter storm."
CANADA: Blackouts were reported in Toronto, as well as Ottawa in the province's eastern region and in much of Ontario. Ontario Premier Ernie Eves declared a state of emergency for the province and asked any nonessential or non-emergency workers to stay home on Friday. In Sudbury, Ontario, 210 miles north of Toronto, more than 100 miners at a Falconbridge nickel mine were staying in underground lunchrooms because the outage halted elevators to bring them to the surface.
