notice outside the library:

attention all students, the air conditioning has broken down.
we are doing our best to get the problem fixed.
for now, students can still enter the library to make use of the services provided, if you do not mind the discomfort; ie the stifling heat, the stale air etc.

lol. i laughed out loud the moment i read it.
the librarian's either drunk or the heat has gotten to her.