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See it: Fireball caught streaking across night sky in multiple Midwest states on Tuesday
More than 100 people witnessed a fireball shooting through the sky late Tuesday night in at least five different states in the Central U.S.
Arctic plunge: Polar vortex locks in snow, ice and life-threatening cold after historic cross-country storm
In the wake of the historic winter storm that blasted 40 states this weekend, a dome of Arctic air associated with the polar vortex is bringing days of life-threatening temperatures to much of the country. Temperatures are expected to remain below average for 200 million people, causing ice and snow to refreeze and potentially exacerbating widespread power outages in the South that were caused by the sprawling system.
Midwest power grid operator warns of need to conserve electricity as historic winter storm sweeps across US
A Midwest power grid operator is warning companies that customers need to start conserving energy as demand grows due to a severe winter storm moving across the U.S.
Historic winter storm: 235 million in path of dangerous snow, ice with first impacts tonight
More than 235 million people across more than 40 states, from Arizona to Maine, are in the path of a potentially historic winter storm that's expected to extend over 2,000 miles and deliver crippling snow and ice, beginning Friday.