Apparently, it’s not just Mark-Jefferson. From Geoff Larcom:
Extreme cold temperatures the last few days, including the coldest day in the last four years, have caused numerous challenges around the Washtenaw County area, testing various mechanical systems to the extreme.
The cold weather resulted in several water main breaks around the EMU campus.
• In the Science Complex, a sprinkler line broke, causing flooding in two classrooms and affecting a variety of other classrooms on the first floor. Affected classes in that area of the Science Complex have been moved to other locations. Students should contact the respective departmental office to find out where their class will be held. Most classes will return to their normal scheduled locations later this week.
• A water main broke between Halle Library and the Parking Garage, necessitating a temporary road closure to fix the break.
• Several underground water main breaks occurred in the Cornell Apartment Complex.
The Physical Plant worked through Tuesday to restore water flow and perform clean up of affected areas. All leaks have been fixed and normal operations have been restored.
The Physical Plant remains ready to quickly respond to any problems that arise, and appreciates your understanding during this extreme cold weather.
I know almost nothing about plumbing and burst pipes and such things, but isn’t this a little strange? I mean, I know it’s cold and everything, but it’s not that cold. I don’t think we’re setting any records, for example. And isn’t a little strange that this all would happen at once?

We had a frozen pipe at our house. It was -7 in Ann Arbor. Fortunately, the piped did not burst.