I live in a two story house the temp is about 68 upstairas but was below zeero outside last night. Now the heating zone on that floor is not working and there is no water coming out of the spout in the upstasirs bathroom sink and tub. The toilet flushes though

I live in a two story house the temp is about 68 upstairs but was below zero outside last night. There is no water coming out of the spout in the upstairs bathroom sink and tub. The toilet flushes though