Arctic Blast Grips US, Canada

Facts

In what the US National Weather Service is calling an "epic, generational" onslaught of arctic air, record low temperatures and high winds from Canada barrelled into the northeast United States Friday.
NBC climate reporter Bill Karins tweeted that Northern Maine will become "one of the coldest locations on the planet," facing -30°F (-34°C) temperatures. Wind chills are expected to make it feel as cold as -40°F (-40°C) in New Hampshire and Vermont and -100°F (-73°C) on Mount Washington.
The airmass previously swept through the southern US — bringing bad weather that killed at least eight in Texas, two in Oklahoma, and one in Arkansas. In total, the cold airmass is expected to affect 100M people in the Northeast US and Canada.
Record wind chills as low as -35°F (-37°C) will be felt in cities such as Boston, Mass., and -25°F (-31°C) to -35°F (-37°C) in New York City, with Md., Del., Pa., N.J., and Midwestern states also feeling the impact.
Parts of Canada are expected to face temperatures between -36°F (-38°C) to -58°F (-50°C). The wind chill in Toronto plummeted to -20°F (-29°C) on Friday.
Two weather systems are working together to push the arctic air south — a rapidly intensifying "bomb cyclone" above the Labrador Sea, and intense high pressure above Ontario and Quebec.

Narrative A, as provided by The Weather Channel. As is playing out with this weather system, short bursts of extreme cold do not mean global warming is a myth. In fact, after decades of human-caused warming, "weather weirding" is playing out across the world. Don't dismiss climate change — it could even be contributing to extreme polar plunges like these.
Narrative B, as provided by Financial Times. It's easy to dismiss any extreme weather event as a consequence of climate change, but in reality, they're usually influenced by a myriad of factors that have nothing to do with it. More research is needed before we can establish any direct causal link between the two.