Polar vortex grips North America as transport systems seize up

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The “polar vortex” in North America, which has led to Manitoba being as cold as Mars and subzero temperatures said to be heading as far south as Florida, is disrupting transport across the continent. With temperatures down to -50C in some parts,  companies are telling staff to stay at home and closing offices, while there are road closures across many parts of the US. Thousands of flights have been cancelled, with United, based in Chicago, said to be hit particularly hard among international carriers. Express operators have warned e-retailers that deliveries will be delayed, again. For USA Today’s story on air cancellations, go here. Or for other transport news, go to “read more”.