A round of frigid temperatures is sweeping across much of the United States this week, bringing dangerously cold conditions to millions and setting the stage for widespread disruptions.

Atmospheric rivers are a plume of moisture that extend across the Pacific to near Hawaii. When they hit land, they can cause heavy rains and snow. Here’s a look at the phenomenon: ...

The rain has intensified in California, where an atmospheric river brought heavy downpours, winds and flooding to areas ...

Storms dumped heavy snow and freezing rain on a swath of the U.S. East from Kentucky to the nation’s capital, causing ...

A regional jet carrying 64 people collided with an Army Black Hawk helicopter carrying three soldiers. Here's what we know about the incident so far.

Malibu's Pacific Coast Highway, which just reopened after last month's devastating Palisades Fire, is closing again Tuesday ...

What is a Pineapple Express? It's a type of atmospheric river that forms a long, narrow tract in the Earth’s atmosphere. This jet stream gathers moisture from the tropics near the equator and ...