More than 270,000 Americans, particularly those in the Pacific Northwest and Deep South, are experiencing widespread outages.

CLEVELAND — When a winter storm rages outside, snow, ice and wind aren’t the only things you have to worry about. A power outage can turn a few hours of severe winter weather into a days-long ordeal.

The Oncor outage map shows that many customers are in Garland, Rowlett and Fate. The number of customers without power ...