Polar Vortex, Canada

What to Know About the Polar Vortex Collapse
Polar Vortex collapse set to send temperatures plunging in the US and Canada
Polar Vortex collapse to bring severe winter weather with snowfall to Canada, US; What is it? How does it happen?
Met Office give 'polar vortex collapse' update as Brits could face Arctic blast
Forecasters are now 'confident' of a sudden change in the weather developing this month - meaning a return to snow, ice and frosty temperatures for the UK and Europe
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The polar vortex is acting weird and the US is paying the price this winter
It’s really, really cold again – as the US shivers through at least the eighth blast of air from the Arctic this winter. Here’s why it keeps happening.