This makes sense to me b/c "those fallen angels" and their offspring were taken care of by the flood. I don't think GOD would allow that to happen again, he stated he would not destroy the earth again in that manner. Hence the rainbow covenent with Noah. Just my thoughts. However, Fire maybe another story and another scenerio.
LOL, you took the words right out of my mouth. I suspect we will all watch it from above, as the elements melt with fervant heat.