Brutally cold weather expected to hit south and north-east US

Pedestrians brave sub-zero temperatures while walking across a street in Kansas City (AP)

Warnings have been issued throughout the US as brutally cold conditions continue to sweep across parts of the country.

Frigid air spilled into the US Midwest from Canada on Friday, with several states under advisories as forecasters warned that wind chills as low as minus 34C could be common until Sunday morning.