Hundreds of homes across Preston were left without power on Sunday evening.
Electricity North West tweeted to say 1,735 properties were off supply in the PR2 area of Preston, at about 5.30pm on Sunday.
They apologised to residents and said a team was due to be on site as soon as possible to restore supplies, after a fault had caused the outage.
There were reports of power out in the Blackpool Road area of Lea and Ashton.
It was restored at about 6pm.