Dreams of buildings

I am in a large house, with many people, like some party or gathering. Outside there is some sort of pyrotechnic display, meteors or a volcanic explosion. I think that the house is going to catch fire any moment, and feel the bittersweet of having had many good memories, but also feel okay to move on. Heather is conspicuously absent, but i am talking with a couple of good friends.

In my dreams, buildings usually have many levels and seem to represent my conscious and subconscious mind. Often there are hidden or inaccessible parts to these buildings. I recall one in a large multilevel library, with hard to find stairs leading to unlit levels. Or, another dream, where an entrance led to a large underground cave, again with many levels, and the bustle of people on each level. The sense that each level holds secrets and surprise.

This dream was different, only having one level, and also being a well lit and accessible house. Also, there was impeding disaster, signifying, as always, change.