Both Central Maine Power and Emera Maine say that while they expect to restore service to most of their customers by the end of the day Sunday, some may not have power for at least another night.

As of 4:00 Sunday afternoon, CMP was reporting 31,916 homes and businesses without lights, down from a peak of 203,000. Emera Maine was still working to restore power to 10,274 customers, down from a peak of 75,000.

CMP President Doug Herling says some customers in Waldo, Penobscot and Somerset counties, which saw the most outages, will have to wait until Monday because of the amount of snow still on the ground and tough driving conditions.

“Also the frost is coming out of the ground so some of the back roads are really muddy and very difficult for our large trucks to go down, so we've got some challenges in those three counties.”

Emera says it expects to have 90 percent of its customers back online before the end of Sunday and hopes to be able to finish restoration on Monday, but says it will have more up-to-date information later Sunday and early Monday.

Originally published April 12, 2020 at 1:30 p.m. ET.