Schools and offices have closed and flights have been cancelled as a polar vortex of ultra-cold air blasts snow, ice and wind across the US.

MISSION, Kan. (AP) — Road conditions were deteriorating Saturday in the central U.S. as a winter storm brought a mix of snow, ice and plunging...

MISSION, Kan. (AP) — Road conditions were deteriorating Saturday in the central U.S. as a winter storm brought a mix of snow, ice and plunging...

A polar vortex is set to unleash dangerous cold, record snow, and travel chaos across millions of Americans. 

A polar vortex is set to unleash dangerous cold, record snow, and travel chaos across millions of Americans. 

Dangerous wintry conditions descended Sunday on a large swath of the central United States as a severe storm system tracked eastward, prompting travel...

Dangerous wintry conditions descended Sunday on a large swath of the central United States as a severe storm system tracked eastward, prompting travel...

A severe winter storm brought snow, ice, and strong winds to parts of the US, causing dangerous travel conditions and power outages. States such as...

Road conditions were deteriorating Saturday in the central U.S. as a winter storm brought a mix of snow, ice and plunging temperatures, with forecasts...

Flooding closes main roads as cold air forecast to return from Monday – and possibility of more snow later in week