Some feedback, if I may.
You should buy a pot of that wood stain stuff. I am not sure what it is called, but if you don't know what I mean, Army Painter also sells it in a slightly more expensive pot called Army Dip, and GW sells it at an insane premium price called Agrax Earthshade (though admittedly, that's for small minis). Wash it over everything. It will give your buildings both a LOT of definition as well as a sort of dirty look. Especially the recesses of the building will benefit from it, as it also gives a sort of shade. All in all, it will make your buildings look even better!
Finally, if I were you, I'd get some regular sand (just sand) and paste it on the base. Again, it will give your base definition as well as make the buidling mash a bit better and even make it slightly sturdier.
That said, all in all, wonderful start!
Oh and good luck with the storm! Terrible stuff, I saw it on the news today.