A Midwest power grid operator is warning companies that customers need to start conserving energy as demand grows due to a severe winter storm moving across the U.S.

This historic storm will spread destructive ice and heavy snow over 34 states through Monday in the South, Midwest and Northeast, including a potential nor’easter. Here is the very latest forecast.

A high-impact and potentially historic winter storm is underway, delivering heavy snow, crippling ice, and days of life-threatening travel conditions to more than 245 million people from Arizona

Managers of electric grids say freezing temperatures and ice and snow could lead to power outages in many places, potentially leaving millions in the dark.

Now comes even more frigid weather in the U.S. Midwest. Extreme cold with near-zero degree wind chills descended upon parts of Iowa, Nebraska, Minnesota and Wisconsin, forecasters said Tuesday, even as utilities worked to restore power to thousands of ...

Power outages are rising rapidly. The area from northeast Georgia into southern Virginia faces significant icing. Snow is set to slam the Mid-Atlantic and Northeast.

A potentially historic winter storm is set to shut down travel and knock out power across a huge area.