Maybe I missed the thread Sno is speaking of - what I do remember is one regarding plumbing in exterior walls, this is not my worry. My worry is what is happening underground. Yesterday I measured 42.8 deg F, today I measure 38.5. This morning I spotted water utility trucks down by Odana and Nakoma amongst a flood of frozen water, looking at the forecast I expect we will see more of this. I will be letting a tiny stream of water to flow from the basement tap over the next week - I am unsure how much this will help.