"US Braces for Snow and Sub-Zero Temperatures in Winter Storm"

A powerful winter storm is causing chaos across the Midwest and Plains regions, with heavy snowfall, freezing temperatures, and severe weather advisories affecting travel, power outages, and school closures. The storm has led to over 1,000 flight cancellations, a ground stop at Chicago O'Hare International Airport, and the cancellation of events for GOP presidential candidates in Iowa. Additionally, severe weather in the Southeast and an avalanche in Idaho have added to the storm's impact. The National Weather Service warns of a surge of Arctic air and century-old record low temperatures to come next week.