People living "basically anywhere from the Rockies eastward" will see extremely cold temperatures over the next several days, a meteorologist says. That includes Kansas City, which is set to host a Chiefs playoffs game this weekend.

According to the National Weather Service, a polar vortex will impact most of the country this weekend, here is what you need to know.

A polar vortex is currently hitting the United States, with schools closed in many areas and at least four deaths caused by treacherous conditions.

more than 40 million people were under winter storm warnings while in areas of northeastern Kansas to north-central Missouri snowfall of up to 15 inches was observed. But the latest polar vortex ...

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

Recent forecasts suggest some Americans might be getting a much-needed break from the freezing temperatures that have gripped much of the country.

The plunging polar vortex is bringing subfreezing temperatures to some of the southernmost points of the U.S. A forming storm system is threatening to dump snow on parts of Texas

The polar vortex of ultra-cold air usually spins around the North Pole, but it sometimes ventures south into the U.S., Europe and Asia. Some experts say such cold air outbreaks are happening more frequently, paradoxically, because of a warming world.

Erin Davis/Axios Visuals An invasion of frigid air from the Arctic is sweeping south from the Plains and Ohio Valley Sunday, moving towards the Southeast and East. Threat level: The colder-than-average temperatures threatens public health for those exposed to the wind and cold,

A dangerous and potentially life-threatening stretch of cold weather has much of the U.S. on alert as a lobe of the polar vortex invades the nation and sends temperatures tumbling to levels not seen in years.

The polar vortex of ultra-cold air usually spins around ... Kentucky, Missouri and Kansas canceling or delaying the start of classes Monday. Among them was Kentucky’s Jefferson County Public ...

Although people from all over the country, of all ages and backgrounds, joined the People's March, one protester said no one felt like a stranger.