There are some discussions about dust masks in the archives. I carry 2--N95 masks in my bag, mostly for the likely building collapse and hopefully subsequent rubble digging.

There are also discussions both here and on the main site about smoke hoods which you may also what to take a look at. I have not added these to my kit, but it is not because fire is not a risk, just like the swim goggles have not done it.....yet.

Loads of stuff on both the forum and main site, almost overwhelming, but evaluate your likely scenarios and start getting prepared. Lots of help here.