By Jim Melwert

PHILADELPHIA (CBS) – The company that manages the power grid for the Philadelphia region says things are returning to normal.

READ MORE: CBS3 Pet Project: How To Help Your Dog, Cat Get Through Fourth Of July Fireworks

The call for conservation came from Valley Forge based PJM Interconnection, which manages the power grid for about 61-million people.

READ MORE: Philadelphia Police: Body Found Tied Up, Shot Inside Trunk Of Burning Car In Fox Chase

It was to expire last night, but was extended through the morning, says spokesman Ray Dotter:

“But we’re seeing an improvement in the power supply, and with temperatures not as cold throughout the day, and improving throughout the week,” he said. “We think the power supply will be in good shape.”

MORE NEWS: Philadelphia Weather: Remainder Of Fourth Of July Weekend Looks Great

Dotter says they saw a winter record set last night, and just the amount they broke the record by — 5,000 megawatts — would have been enough power a small city.