here is a BLEVE film of a tank about a third of the size of the fuel tank in KC
http://www.bing.com/videos/search?q=famous+nevada+explosion&qpvt=famous+nevada+explosion&FORM=VDRE#view=detail&mid=8D0CE75527C6CD85F9E98D0CE75527C6CD85F9E9
It had perchlorate in it too.