We all have a rare day off from school today due to extreme cold temperatures. The wind chill when I woke up this morning was -36°F.

Interestingly, that’s cold enough that normally pliable plastics become near solid. Practical example: Sarah pulled out our electric pump to put some air into a low tire on the car. The power cord was stiff and difficult to work with. When she plugged it in and turned on the compressor, sparks flew and the cable was severed in half! We think that the plastic effectively snapped in the cold, causing a short circuit.

This reminds me of an experience I had during my first year in Minnesota. I biked to school one morning when it was severely cold. (I rarely biked in the winter, but there was no snow or ice on the roads, so I chanced it.) My bike lock at the time was a heavy braided steel cable sheathed in clear plastic. I normally kept it coiled around my seat stem, uncoiling it to run through the wheels and rack. On this morning, however, I could not uncoil it, it was like a solid steel helix wrapped around the post. Putting all my strength into it, it finally gave a little and then shattered. I distinctly recall the sound of the plastic shards hitting the cement like tinkling glass. The steel cable itself was unscathed, but the plastic was unable to cope.

The cold does come with some bonuses besides getting a day off from school. Our sun porch, not as well insulated as the main house, forms spectacular window frost patterns.

Next week, Maggie and I are heading up north for a week at Camp Widjiwagan. This is the annual seventh grade retreat that I’ve chaperoned for many years. We’re both looking forward to it. Yesterday, however, I checked the weather report near the camp:

That’s seriously cold. Fortunately, the outlook for next week is balmier. With highs in the teens above zero, the kids will likely spend all their time rampaging through the wilderness while their long-suffering teachers tend to the fire in the cozy lodge.