People living "basically anywhere from the Rockies eastward" will see extremely cold temperatures over the next several days, a meteorologist says.

Portland was forecasted to be about 6 degrees below normal Sunday and Monday, according to the National Weather Service.

A polar vortex is set to bring freezing temperatures to much of the country over the next week. Here's what you need to do to protect your home

However, a deep freeze, thanks to the polar vortex dipping down from Siberia, is about to bring even harsher, frigid temperatures to nearly 300 million Americans starting this weekend.The polar vortex is a large area of cold air and low pressure that normally spins over the North and South Poles.

An arctic blast will send temperatures across the United States plummeting as bitterly cold air that originated in Siberia will arrive from Canada by week’s end, bringing with it dangerously cold wind chills for millions of Americans.

Americans were bracing Thursday for frigid temperatures that forecasters said could produce life-threatening conditions, with Donald Trump's inauguration expected to be the coldest in 40 years.

Temperatures are expected to plummet over the weekend, bringing life-threatening conditions to large stretches of the United States. The polar vortex will send temperatures below freezing for much of the country starting this weekend and stretching into next week,

Perfect time to hop on a plane and go somewhere south,” FOX Weather Meteorologist Britta Merwin said. “Like, really, really far south.”