Slowly, New York City Returns to Normal after Massive Blackout.

Byline: Adam Fifield

Aug. 17--NEW YORK--New York City groaned fully back to life early yesterday morning, as the subway resumed service about 32 hours after it was paralyzed by the biggest blackout in U.S. history.

In Cleveland and Detroit, power was fully restored by yesterday afternoon. In both cities, however, water pressure was low and residents were advised to boil water before drinking it or cooking with it.

Investigators turned their attention to three electric transmission lines in Ohio that may have sparked the outage on Thursday afternoon that cut power to 50 million people in eight states and the Canadian province of Ontario.

Full electrical power was restored to New York City at 9:03 p.m. Friday, and the subway resumed service shortly after midnight. But on the day after the lights came back on, there were still inconveniences.

For many residents, as well as operators …