US cities face dangerous temps, prolonged outages

Extreme cold temperatures persisted across the central and eastern United States on Tuesday as power outages are expected to last for several days in some areas, raising concerns for hundreds of thousands of homes and businesses without electricity.

Tens of millions of Americans were under alerts for severe cold as a blast of Arctic air prolonged below-freezing temperatures, according to the National Weather Service. Forecasters with AccuWeather warned that the region is expected to maintain the cold temperatures in areas already covered in snow and ice, creating life-threatening conditions...