If you have a water line that is on an outside wall, you can leave a trickle of water running all the time, and wrap the line in towels to help insulate it. It may stop the freezing. You could also run some water in the bathroom. Not all faucets, just one.
Just sayin’. You probably already thought of this...
Good stuff, that.
In our apartment all pipes are well insulated. I don’t know about the work building.
The main that broke Tuesday night was underground, but there was a grate above it.