Skaters on Ottawa's Rideau Canal on Sunday were being advised to bundle up. (Paul Dwulit/CP)

It's going to be like living in a giant freezer for the next few days across most of Ontario.

With the wind chill in Toronto already making it feel like –29 C — and an extreme cold alert in effect — the city is facing at least another couple of days in the deep freeze.

That goes for Windsor and Ottawa too — as well as all communities in between.

Environment Canada issued a special weather alert Sunday morning.

The national weather service says a large Arctic high pressure system pushing south through the province is to blame. The temperatures associated with it are "the coldest of the season so far in many regions," Environment Canada said in a news release.

"And as a result, wind chills of –30 to –25 are expected over Waterloo region and the City of Toronto. Elsewhere wind chills of –30 or colder are occurring and a wind chill warning is in effect."

Ottawa reported a daytime high on Sunday of –22 C; add in the wind chill and that dips to a bone-shivering –36.

Environment Canada has issued a wind chill warning for the National Capital Region to go along with a frostbite alert issued by Ottawa Public Health.

Ontarians are being told that "when outdoors … exposed skin could be subject to frostbite in as little as 10 minutes. People should dress appropriately as a result."

In Windsor, meanwhile, Sunday's high was expected to reach –10 C, with the wind chill making it feel more like –15.

A little further north, in Sarnia-Lambton County, Environment Canada is advising drivers to watch for blowing snow off Lake Huron.

Environment Canada says that by Tuesday the temperatures in Toronto will climb back above freezing.