Polar vortex death toll rises to 21 as US cold snap continues February 01, 2019 at 03:43AMhttps://https://bbc.in/2Gg7JXw Some 90 million people see temperatures of -17C or below, as cities and transport systems are hit.

Some 90 million people see temperatures of -17C or below, as cities and transport systems are hit.

from BBC News - World https://bbc.in/2S4CB4v