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

The week began with a biting cold snap that hammered much of the U.S., the product of a jet stream that slips out of its usual path more often these days.

The images, captured on January 6 by the Moderate Resolution Imaging Spectroradiometer (MODIS) instrument on NASA’s Aqua satellite, reveal the spread of snow across the Midwestern states. It’s enough to make Old Man Winter blush.

Then, catastrophe in California, with wind-whipped flames ... That means more energy bouncing off and warping or moving the polar vortex, scientists say. And climate change is also messing with ...

Frigid air that normally stays trapped in the Arctic has escaped, plunging deep into the United States for an extended visit that is expected to provoke teeth-chattering but not be record-shattering

Attorneys for a woman who lost her home in the Los Angeles-area Eaton Fire filed an emergency request late on Thursday for Southern California Edison to preserve additional electrical equipment to be examined in blaze investigations,

NEW ORLEANS (AP) — The vast majority of Americans are about to get an extended taste of frigid Siberian weather. Another polar vortex disruption will stretch Arctic air across the top of the globe and make Donald Trump's second inauguration the coldest in 40 years, meteorologists said.

The Weather Network's meteorologist Nicole Karkic has the details on snow, wind and the polar vortex hitting the Prairies.

About a week after a polar vortex brought snow and freezing temperatures to Texas, another cold snap is expected in time for the MLK holiday weekend.

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

Some experts say the Frigid air that normally stays trapped in the Arctic escaping is happening more frequently because of a warming world.