US plunges to -18C ahead of expected "polar vortex"
Published 06/01/2014 | 01:36
SNOW-covered roads, high winds and ice were creating dangerous driving conditions in the US from the Midwest to the Northeast yesterday, ahead of a "polar vortex" that will bring temperatures to below -18C.
It has not been that cold for almost two decades in many parts of the US.
Medical experts are reminding people that frostbite and hypothermia can set in quickly in such extremes.