NIE say around 2,300 customers are still without power after winds gusting up to 70 mph battered Northern Ireland.
And weather forecasters are predicting ice and skifts of snow are on the way in Thursday evening on high ground.
At the height of the storm, around 30,000 customers have left without electricIty as cables came down in the winds.
A number of roads in the Bangor area shut early in the morning because of falling trees.
The Christmas market in the grounds of Belfast City Hall had to closed for a while for safety reasons as the wind lashed the stalls.
A number of the cross channel ferry services were also cancelled because of the winds on the Irish Sea along with the services to Rathlin Island and Ballycastle.
NIE said it had opened local incident centres across Northern Ireland.
“We would hope to have the majority of customers back on supply tonight,” said spokeswoman Julia Carson.
“However, due to the high volumes of individual faults, some customers in isolated areas may be off supply for a longer period.”
Strong winds led to the Foyle Bridge being closed to high-sided vehicles earlier on Thursday, but it has now re-opened.