Back when I was a child, in Ohio in the early 1960s, I can remember times when temperatures dropped into the teens, or even significantly below zero. There would sometimes be thick frost on the windows. (Does that still happen in Ohio now? I wonder how cold it must get for that to happen.) No one used the language “polar vortex” or “arctic vortex” back then. Maybe 50 years ago such language did not yet exist.