The upper floors of the buildings had to be vacated, and partitions of unpainted boards went up to cut off the stairways.
There are no more uses of "vacate" in the book.
Show samples from other sources
Thus Willow Marks's early procedure, and the graffiti scrawled on her house; thus the fact that Chelsea Bronson was kicked out of school after allegedly being found breaking curfew with a boy from Spencer, and her parents were mysteriously fired, and her whole family was forced to vacate their house.
Lauren Oliver -- Delirium
The cot had been vacated and I moved shakily toward it, trying not to sneeze or breathe as I squeezed past my cellmates.