More than 8,000 flights scheduled for the weekend were cancelled as a major winter storm swept across the United States, bringing heavy snow and dangerous ice from east Texas to North Carolina. According to FlightAware, at least 3,400 flights were delayed or cancelled on Saturday and over 5,000 were called off for Sunday. Roughly 140 million people from New Mexico to New England were under winter storm warnings, with forecasters warning that ice damage could rival that of a hurricane.

Snow began falling in Texas, Oklahoma, and Kansas on Friday as the storm combined with Arctic cold to engulf much of the country. Meteorologist Jacob Asherman described it as the season’s most intense storm, with wind chills dropping below minus 45 degrees Celsius in the Dakotas and Minnesota. The worst conditions were expected in Louisiana, Mississippi, and Tennessee, where ice could reach an inch thick.

Governors in more than a dozen states declared emergencies or urged residents to stay home. President Donald Trump said federal agencies were coordinating with local officials, while New York City Mayor Zohran Mamdani mobilized the city’s sanitation department for large-scale snow removal.