Kudos and thanks to everyone who's living through this and has still made the effort to post. Be assured that we are reading the details closely. There is no substitute for "boots on the ice" experience.

A note that may be of use: if there is still water pressure (not clear if that's the case), one way to prevent freezing is to let your taps drip/run slowly. It takes an extra amount of cold to freeze moving water. And a surprising amount of 'free and green' geothermal energy comes up through the water mains.