Officials urge Americans to stay indoors as historic winter storm creates "catastrophic" ice conditions and triggers the largest weather alert ever.

A massive winter storm impacted a vast swath of the United States this weekend, delivering widespread snow, ice, power outages and widespread travel disruptions from Texas to New England. The storm affected three dozen states and brought the most snow in five years to some cities,

The U.S. workweek opened with yet more snow dumping on the Northeast under the tail end of a colossal winter storm that brought ice and power outages, impassable roads, canceled flights and frigid cold to much of the southern and eastern United States.

More than 230 million people are under winter storm threats as officials brace for power outages and travel difficulties.

Thousands in the United States are without power after a deadly winter storm slammed into the central and eastern regions of the country. Tennessee is one of the states that has been hit the hardest. As of 1 p.m. ET, 239,207 customers were without power, according to USA TODAY's power outage tracker.

Another snowstorm? Forecasters say a nor'easter could arrive next weekend. But for now, “it’s too early to cheer, panic or change any plans."

The storm deaths were reported in New York, Tennessee, Louisiana, Kansas, Texas, Massachusetts, Arkansas, Ohio, Pennsylvania, Mississippi, Kentucky and New Jersey, and other deaths were under investigation.

A brutal winter storm has tightened its grip on the central United States, bringing dangerous cold, deep snow and at least one confirmed death in Kansas. The system has turned routine commutes and short walks into life-threatening gambles as wind chills plunge and visibility disappears in blowing snow.

Thousands of flights remain canceled after a massive winter storm. Here's when travelers can expect a return to normal.

A powerful winter storm has caused widespread disruption across the United States, killing at least 30 people and knocking out large amounts of oil production and electricity, according to news agency AP .