As many as 2,000 customers lost power in Greater Morristown on Friday evening, according to Jersey Central Power & Light, for reasons not immediately apparent.
A spokeswoman said the utility hoped to have electricity fully restored by 10 pm.
The majority of the affected customers–about 1,400–were in Morristown, and the rest, in Morris Township, according to the JCP&L website.
In Morristown, traffic lights were out along Maple and Macculloch avenues and Bank and Ann streets early in the evening.
Power first went down around 6:45 pm, followed by another outage at 8:10 pm that affected Morristown Medical Center. The hospital got power back at 8:25 pm, said JCP&L spokeswoman Tricia Ingraham.
“We don’t know the cause,” Ingraham said at 8:30 pm. A message from Morristown police indicated a transformer malfunction on James Street was to blame.