Environment Canada has most of the province under wind chill warnings Tuesday morning.
For Toronto and the GTA, we can expect wind chill values of minus 30 or colder. Areas east of a line from Port Carling through Haliburton and Kaladar to Brockville could reaching minus 35 or colder.
Forecasters say those in the north can expect wind chill values below minus-45 in some areas.
Toronto Pearson International airport reports some delays and cancellations of flights heading into the Chicago and New York areas due to poor weather.
Another batch of heavy snow and frigid temperatures is forecast from Virginia to New England as a winter storm bears down on the mid-Atlantic and northeastern United States.
The National Weather Service says the winter storm could bring up to 25 centimetres of snow Tuesday to New York and Philadelphia and bitterly cold air with wind chills as low as -23 C later in the day.
It warned of heavy winds and hazardous driving conditions throughout the day as the storm moves up the East Coast.
Temperatures are expected to remain below freezing in many places for most of the week, though it's not likely to be as bone-chilling as the recent polar vortex.
The weather service warns the storm could impact the morning commute in Baltimore and Washington.
Meanwhile, the federal government says its offices in the Washington area will be closed Tuesday due to the winter storm.