Severe weather is expected to bring subzero temperatures the northern Plains as soon as Thursday, then reach the Mississippi Valley, the Northeast and the Ohio Valley by Sunday.

A powerful blast of cold air from the Arctic is expected to sweep through much of the United States over the coming days, bringing snow and ice to nearly 30 states and affecting nearly 160 million peo...

Thousands of power line workers were on standby, flights were canceled and bottled water flew off the shelves Thursday as a huge winter storm that could bring catastrophic damage, widespread power out...