The National Weather Service on Thursday warned that “dangerously cold and very dry Arctic air” will spill into the continental United States and lead to “life-threatening risk of hypothermia and frostbite” as temperatures drop well into negative territory, creating some of the coldest weather on Earth.

An arctic blast brings below-freezing temperatures and snow to parts of Florida Saturday. There were reports of snow flurries in the Tampa Bay area. The last two times the area got snow was flurries in January 2010 and December 1989.

The onslaught of severe winter weather has intensified the American Red Cross's severe blood shortage, as mounting cancellations hinder the organization's ability to rebuild the national supply.

Ukraine president says he will wait to see if Putin complies with Trump request to halt strikes on energy infrastructure