When I was in the Royal Navy at HMS Collingwood we had one of the accommodation blocks go up in flames.
I had only recently moved from hat block into another, and most of my training class was housed in there. This happened during the day and so we were all out doing our work.
The base fire party only had very limited equipment and found they could not prevent the fire spreading due to windows being shut - the hoses could not break the glass on the upper floors. By the time the fire brigade arrived most of the damage was done, they had specific hose nozzles for smashing windows and they brought it under control.
The middle two flows were destroyed, the ground floor was wet but generally ok, and the top floor was mostly destroyed, except for rooms towards the four end corners which had been drenched. Unfortunately the kit that was in the lockers in those rooms was still so badly affected by the heat that it was all useless - the clothes looked ok but just crumbled to the touch.
Possibly the worst was when HMS ardent was sunk during the Falklands war. She was hit by a number of bombs in Falklands sound but the thing that killed her were the fires, especially the hanger fire - the information is all online. Our ship was not hit but the survivors were spread around the fleet so we got the word on what took place pretty quickly.
HMS Ardent was on a mission that we had been originally detailed to undertake, however due to some issues we were not able to fulfil the role and she took our orders instead.