Addendum

Oh, and when it's really really cold, car exhaust is so thick it is makes intersections blind and dangerous, and then it settles to the ground and makes the roads extra slippery. And fuel economy goes to hell, because cars need to be started and running for ten minutes before they will drive forward without horrible mechanical screams emanating from under the hood. And the rubber on tires gets more solid and the air inside shrinks so that the bottoms of the tires are flat and for the first few blocks it's like driving on cubes.

Damn, it's cold. I don't expect my hands and feet to warm up until June.