More than 330,000 people are without power after an ice storm hit parts of Ontario on the weekend, according to the provincial utility Hydro One.
Officials say the outages have been concentrated in central and eastern Ontario.
The number of outages jumped on Sunday because of a problem with Hydro One's outage map, with outages not previously accounted for now having been added to the total.
Environment Canada says the areas hardest hit by the ice storm include Barrie, Orillia, the Kawartha Lakes, Peterborough and Kingston. Lindsay got 25 millimetres of ice buildup, the Peterborough area got 20 millimetres, Orillia got 19 millimetres and Barrie got 15 millimetres.
Kristina Kretchman, meteorologist for Environment Canada, said the ice storm did damage.
"There have been many reports of trees down, branches down, unfortunately, some of them hitting infrastructure, such as houses or power poles," she said.
Hydro One, meanwhile, will determine when power will be restored for each outage once damage has been assessed, Kaitlyn Forde, spokesperson for the provincial utility, said on Sunday.
Forde said customers should check Hydro One's online outage map for updated information. Currently, the outage map says restoration may not be until 11 p.m. on Tuesday.
"We're experiencing outages primarily for tree limbs and branches being weighed down due to the accumulation of freezing rain. That accumulation impacts a lot of tree branches and limbs and those that come into contact with our power lines are the main cause of the outages," she said.
Crews are working on restoring power in the hardest hit regions and crews are coming from other areas to help, she said.
Forde said it's critical for customers to stay clear of fallen trees, branches and damaged power lines, saying Hydro One recommends people stay at least 10 metres away. Fallen power lines should be reported to 911 and Hydro One at 1-800-434-1235.
Due to the amount of rain that has fallen, there's a risk of flooding, and Forde said if water starts to reach any electrical outlets, baseboard heaters or the furnace, customers should call Hydro One to have power turned off safely.
"Do not enter any flooded areas until power is disconnected," she said.
Power has been restored for more than 257,000 customers since the storm began, Forde added.
WATCH | Toronto may be spared from the worst of this weekend's ice storm: Environment Canada is warning a messy storm is expected to bring freezing rain across the GTA. CBC meteorologist Chris Potter shares what to expect in this weekend's forecast.Freezing rain began in parts of southern Ontario early Saturday. The freezing rain warning for Toronto and other areas in the GTA, in place since Saturday afternoon, was lifted by about 9:30 a.m. Sunday as the temperature rose above freezing.
Kretchman said the city got between two to three millimetres of ice buildup. She said there were power outages and some slippery surfaces due to the freezing rain.
Freezing rain warnings are still in effect across a "broad swath" of central and eastern Ontario and the ice storm, which developed from a low pressure system from Texas, is expected to continue in those regions for much of Sunday.
In the freezing rain warning for Barrie, Collingwood and Hillsdale, Environment Canada says: "Surfaces such as highways, roads, walkways and parking lots will become icy, slippery and hazardous. Ice build-up may cause tree branches to break. Consider postponing non-essential travel until conditions improve."
Freezing rain left ice on this vehicle in a Scarborough parking lot. (Muriel Draaisma/CBC)In an earlier interview, Hydro One spokesperson Tiziana Baccega Rosa had said some areas in the province, which are known as water-access only, may be without power for more than 24 hours.
Workers will need to either fly in by helicopter or use boats, which they cannot do until the storm is over, Baccega Rosa said.