TORONTO - More than 10,000 Ontario customers of Hydro One remain without power, four days after an ice storm swept through parts of the province.

Hydro One says it has restored more to more than 108,000 customers, using more than 1,200 utility crews to restore power lines.

Hydro says in some areas of southwest Ontario utility polls were snapped and the lines were all ripped up, meaning they had to be rebuilt from the ground up.

A number of municipal utilities have loaned Hydro One crews to help restore electricity.

The biggest pockets of customers without electricity are in Orangeville and Alliston.