About 1,700 customers in Hawaii Kai were without power after a vehicle struck a switching vault near Kaiser High School this morning.
The accident occurred at about 3:40 a.m. on Lunalilo Home Road.
Hawaiian Electric Co. said in a tweet that power was restored to most customers by 9:50 a.m.
Crews were working on restoring power to the remaining customers.
There was no immediate word on injuries.
Meanwhile, another 1,300 customers lost power in the Kunia area just after 9 a.m. Electricty was restored by 9:30 a.m., HECO said in another tweet.
Emergency Medical Services reported the 49-year-old driver of the vehicle suffered a minor nose injury and refused treatment.