Trump assumes office at an indoor inauguration ceremony, while supporters gather at the Capital One Arena to celebrate.

Trump assumes office at an indoor inauguration ceremony, while supporters gather at the Capital One Arena to celebrate.

A polar vortex that has hit much of the U.S. with ice and snow has dealt a glancing blow to Florida, dropping coastal ...

Florida's manatee population is seeking warmer waters due to a polar vortex, with many gathering near power plants. The species is still recovering from a mass starvation event.

The only thing that could spoil Trump's party is the weather, with a potentially lethal "polar vortex" threatening to make his inauguration ... Trump's inauguration underscores how the man whose 2016 ...

The bitter weather -- tied to an Arctic "polar vortex" blast -- is expected to bring nighttime lows as cold as minus 31 degrees Celsius over the weekend for some of the northernmost parts of the ...

We've already fallen as low as 1° this year. Another dip in the polar vortex makes that possible for Cincinnati again next week. We've already fallen as low as 1° this year. Another dip in the ...

The mere mention of the term "polar vortex" can set your head spinning (and maybe eyes rolling). It’s got to be clickbait, right? Or maybe someone dreamed up the name for views? Is it a storm?

Intense snowy wintry weather in the US has been fuelled by activity of the polar vortex, slipping down to engulf large parts of the country. Early January's winter storm prompted seven states to ...