The cold snap caused a sudden temperature drop of up to 10 degrees Celsius within just a few hours and significant snowfall in mountainous areas.

A massive winter storm grounded thousands of flights and left millions in freezing temperatures across the U.S., yet in Minneapolis, tens of thousands of demonstrators marched in bitter cold to demand an end to President Trump’s immigration crackdown

Emergency measures have been activated as freezing temperatures and snow make their way into Greece starting Wednesday.