Hydro One crews have restored power to more than 63,000 customers across the province since the storm began on Friday evening, the utility said in a statement to CTV News.
"On Sunday, crews partially restored an outage impacting customers in the Gogama area," the statement said. "Following a helicopter patrol (Monday) morning, crews located and removed a tree on the power line and restored power to the remaining 500 customers."
Severe weather continued to be a problem, Hydro One said, with crews facing "challenging conditions including poor visibility and driving conditions which has impacted power restoration efforts."
"In the Timmins and Gogama area, approximately 500 customers are currently without power," the statement said. "Additional crews are assisting in restoring power as quickly and as safely as possible to the hardest hit areas in northeastern Ontario, including Timmins.
"We appreciate our customers’ patience as crews continue to work to restore power through challenging weather conditions. Updates can be found on our outage map found here."
More than 2,000 hydro customers in northeastern Ontario were without power Monday afternoon, as early winter storms wreak havoc with Hydro One's power system.
Affected areas include Gogama, where a reader tells CTV News they have been without power since Sunday afternoon.
Hydro One's outage map says about 240 customers are affected, and say power should be restored by 6 p.m. this evening.
About 138 customers are without power in the Cochrane area, which also has a restoration time estimated at 6 p.m.
The 312 customers in the Matheson area should have power back by 5 p.m., Hydro One says.
In Kirkland Lake, 857 customers are without power until 8 p.m., as is the case with 95 customers in Englehart currently without service. The 183 customers without power in Mattawa should have service restored by 5 p.m., according to Hydro One estimates.
The 528 customers in the Parry Sound area affected by an outage should have power again by 6 p.m.