Deadly Winter Storm Leaves 7 Dead and 800,000 Without Power Across the U.S.

A major winter storm sweeping across the United States has left at least seven people dead and caused widespread disruption, plunging more than 800,000 households into darkness, closing schools and roads, and forcing airlines to cancel over 11,000 flights. The National Weather Service (NWS) has warned that “life-threatening” conditions are stretching from Texas to New England, affecting more than half of the U.S. population.

The storm has brought a dangerous mix of heavy snow, sleet, and freezing rain, with forecasters cautioning that the icy conditions may persist for days. Freezing rain in particular poses severe risks, instantly coating surfaces in ice and causing trees, power lines and roadways to fail under the added weight.

Officials have confirmed weather-related deaths across several states. Louisiana reported two hypothermia deaths, Texas recorded an exposure-related fatality, Tennessee confirmed three storm-related deaths, and Kansas authorities said a woman found covered in snow likely succumbed to hypothermia. New York City Mayor Zohran Mamdani noted that at least five people had died on Saturday, though causes have not yet been confirmed, adding that cold-related deaths occur every winter.

Across the eastern U.S., cities from Washington, D.C., to New York are experiencing some of their most significant winter weather in years. D.C. officials said the region is facing its largest snowstorm in a decade, while New York Governor Kathy Hochul described the conditions as an “arctic siege,” warning residents to remain indoors and off the roads. She said the storm is delivering the coldest stretch and highest snowfalls in years, emphasizing that the extreme chill is “bone-chilling and dangerous.”

Southern states unaccustomed to harsh winter weather are also struggling. Temperatures in Texas, Louisiana and Tennessee are 15–20°C below seasonal averages, and officials warn that ice accumulation up to one inch could down power lines, damage infrastructure and make travel nearly impossible. Virginia and Kentucky authorities have responded to hundreds of road crashes amid deteriorating conditions.

Canada is also being hit by the same weather system, with heavy snow across Ontario and hundreds of flight cancellations, adding to broader North American travel disruptions. Environment officials estimate 15–30 cm of snowfall in the province, with hazardous visibility and blowing snow.

Nearly half of all U.S. states have declared emergencies as the storm intensifies. Schools across the country have already cancelled Monday classes, and even the U.S. Senate postponed a scheduled vote, citing dangerous travel conditions. In Washington, Mayor Muriel Bowser urged caution as the city grapples with a rare and powerful snowstorm.

Meteorologists attribute the storm largely to a destabilized polar vortex, a ring of cold winds that typically sits over the Arctic. When the vortex weakens, bitter Arctic air dips far south into the U.S., creating conditions for major winter storms. As the cold air meets warmer southern air, strong storm fronts form and intensify.

The system is expected to continue moving eastward, clearing Canadian maritime provinces by Tuesday but leaving dangerously cold air in its wake. Forecasters warn that this deep freeze could linger into early February. Some climate experts suggest that shifts in sea-surface temperatures related to climate change may be influencing the behaviour of the polar vortex, potentially increasing the risk of extreme winter events.