If you thought the bone-chillingly cold weather Toronto has been receiving the past few days was bad, you're not going to want to know what's ahead.\nRight now, most of Ontario is under an extreme cold weather alert, Niagara Falls is practically frozen over and Toronto's recent cold streak has just broken a 57-year-old extreme cold record. And it's only going to get worse. Yeah, you may want to think twice about that New Year's Eve outfit you just bought.\nA blast of Arctic air straight from Siberia is breaking temperature records as we head into New Year's Eve and New Year's Day. If you have outdoor plans, you're going to want to trade in that mini skirt for a parka, because the first day of 2018 will be in the minus 20°'s, with wind chills in the minus 30°'s.\nIf that wasn't bad enough, there's a risk of whiteout conditions for the final days of 2017 and to start the new year.\n@nathanphillipssquareembedded via\nAccording to the Weather Network, you can thank something called the Polar Vortex for the insanely cold temperatures. It's a large area of low pressure and cold air surrounding both of the Earth's poles. While it always exists near the poles, for Canada, it weakens in the summer and strengthens (a lot) in the winter. And it's here to ruin your New Year's plans.\nThe good news? The frigid weather is expected to relax in the second week of January. Tonight, wind chills are expected to be slightly warmer than this morning, but we'll still be sitting at a frosty -22°C to -27°C.\nUnfortunately, the forecast for New Year's Eve and New Year's Day is still dismal, with daytime and overnight temperatures of -22°C. So stay warm, celebrate lots and keep the frostbite at bay.