I would think that there would at least a sprinkler system. Hundreds of payphones are affected. One person related their experience. Direct dial calls still seem to be impossible, but operator-assisted calls sometimes work. I was able to make three long distance calls with my calling card this afternoon.
Many computer rooms are sprinkler equipped.
The standard heads are fuse style, but most computer rooms use thermostatic ones that turn off again when the area cools. Second, the switch itself is only part of the space in the building. By the way, even 8 years ago, many CO's were unmanned even during working hours. Only those with test boards were staffed. I think the real message of Hinsdale is failure to learn from the mistakes of the past.