I was living in Angeles when Pinatubo blew its top.

An experience I would not care to repeat.

Our roof came in, and later all our stuff was looted.

A foot of ash covering 100's of square miles, which then (because of heavy rain) turned to a sort of liquid concrete that tin roofs were not built to support.
It also blocked all the rivers and filled all the drains up.

Moving down the rivers it demolished most of the bridges...and anything else in its way.