Compare these two maps.
Here’s a map from the BBC showing the extent of the “Big Freeze” over North America on 8 January 2014.
And here’s a map of the extent of glaciation during the last ice age.
Notice any similarities?
When someone tries to tell you that the polar vortex that hammered so much of the United States and Canada with record-breaking low temperatures was caused by global warming, show them these maps and ask them if the last ice age was also caused by global warming.
Thanks to Icewoman for this link