They are responsible for producing heavy rain and snow, especially when pushed up against mountain ranges like the Cascades and Sierra Nevada. A well-known type of atmospheric river is called a "Pineapple Express" because it flows from the Hawaiian Islands.

Beyond direct injuries, exposure to tropical cyclones is associated with higher risks of death across a range of causes including kidney, heart and lung diseases, neuropsychiatric conditions, and diabetes, finds a study published in The BMJ's climate issue ...

This intense storm will bring moderate-to-major impacts to about 35 million people in the East and extreme cold to millions more this weekend.

Extreme winter weather hit parts of the Eastern Seaboard on Saturday, with the Carolinas bearing the brunt. Skyler Henry reports from Norfolk, Virginia.

Fox News correspondent Madison Scarpino reports live from Charlotte as a bomb cyclone triggers widespread travel delays and flight cancellations across the East Coast on 'Fox News Live.'

A "bomb cyclone" is starting to bring heavy snow to the Southeast and is ushering in frigid temperature to much of East Coast Saturday. About 240 million people are under cold weather advisories and winter storm warnings.