Polar vortex back in Canada, flights delayed

A scarf kept a statue warm in down town Ottawa, On. Tuesday Jan 21, 2014. A very kind person...

A scarf kept a statue warm in down town Ottawa, On. Tuesday Jan 21, 2014. A very kind person knitted some scarfs and put them around the necks of some statues down town with notes attached to them telling people that if they are cold they are welcome to take a free scarf. Temperatures were as low as -27 Tuesday. Tony Caldwell/QMI Agency

QMI Agency

, Last Updated: 12:50 PM ET

Another cold blast has caused problems for travellers in the eastern part of the country as several airports report delays and cancellations.

Air Canada, WestJet and Porter Airlines all issued travel advisories for Wednesday for travel into and out of Toronto, Ottawa, Montreal, the Maritimes and the northeastern United States, due to snow and extreme cold temperatures.

Pearson Airport in Toronto, which ordered a "ground stop" during the last deep freeze on Jan. 7, stopping planes from landing or taking off, said on Twitter systems were "running normally" Wednesday morning.

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Environment Canada had issued a special weather statement for parts of Ontario along the north shore of Lake Ontario, where frigid temperatures greeted people Wednesday morning. The wind chill made it feel like -30C, but temperatures were expected to rise to -15C during the day.

In Quebec, a wind chill warning was in place. Hydro Quebec said in a release Tuesday it was anticipating "significant power consumption" Wednesday and Thursday due to the extreme cold and asked customers to conserve power during peak hours.

The utility said consumption hit a record high 39,240 MW at 7:26 a.m. Wednesday morning. The previous peak was 38,797 MW on Jan. 23, 2013.

Blizzard warnings were in effect in Nova Scotia, Prince Edward Island, Newfoundland and Labrador and parts of New Brunswick. In Halifax, as much as 40 cm was expected to fall before Thursday morning, Environment Canada forecasted.

On Tuesday, a winter storm in the northeastern U.S. led to the cancellation of 3,000 flights and schools and government buildings were shut.