A powerful winter storm sweeping across the United States has claimed 10 lives and left nearly a million without power as freezing conditions persisted into Monday, officials and authorities said, reported Al Jazeera. The storm has prompted widespread travel disruption, including mass flight cancellations and warnings to motorists to stay off icy roads, while at least 20 states and Washington, DC, declared states of emergency. In Texas, authorities confirmed three deaths, including a 16-year-old girl killed in a sledding accident, and in Louisiana, two people died of hypothermia, state health officials said, reported Al Jazeera. Officials warned that an Arctic air mass trailing the system would keep temperatures dangerously low for days, prolonging travel and infrastructure disruptions. Several major airports in New York, Philadelphia and Washington, DC, cancelled nearly all flights for the day as crews worked to clear runways.