What to expect after a cooling failure

No stats, but way back in the day of very large computers (1 each) in very large facilities, it seems like the thing we worried most about at restart was too-rapid cooling and the resulting condensation if the conditions were right.

After power-up the next thing was disk crashes that occurred on the way down (this was a long time ago discs and drums are different now).

Lastly was overheat failures which were relatively few and always in components with a weakness reputation.