Shovel for 4 hours and you can get just about anything to flow.
41 below last night without the wind chill a little north of us. Only -35 or so for us.
My kids get on the bus about 2 blocks away from the house. The little punks (9 & 11) are outside playing in the snow for a half hour before the bus comes. It was almost -30 and they could care less. I even watch them out the window when it's this cold, but it's like they don't have sensors that tell them "Holy S**T it's cold out here.
No question these are dangerous temps though if you weren't prepared for it. There have already been a few people killed this winter from the cold. Some always get stranded and have a light jacket, no cell phone, dress shoes, and a baseball cap. Go figure.
I don't even leave the house(we're a little off the beaten path out here, but not much) without boots, gloves, hats, facemasks, propane Cat heater and a couple of propane bottles, blanket, etc stored in my drawers.
So in answer to your question, yes it flows, but only til it freezes solid. Which today would only take a few minutes if you're not dressed for it.
That's a bummer.... But at least you're home, and not posting that from your cel somewhere on a hill.... 
