Re: What is the most frightening sound in a server room?
I had a very similar experience at about the same time. The on-site DEC engineer pointed out the RA81s would be out of warranty if their temperatures exceeded a certain value, so the Ops Manager got the loading bay doors open* and 'a number' of large fans running. No loss of service (it was some VAXclusters and an IBM mainframe clone) and no hardware loss.
NN
*I'm pretty certain he had the building main entrance open, and the multiple security doors through to the machine room open as well to get airflow through - in through the entrance, out through the loading bay, with people stationed to prevent unwanted visitors.