So, for the second time so far, my After the Bomb group has decided to resolve disputes by setting buildings on fire and smoking/burning the bad guys out. No more wood structures for them!

Anyway, I was wondering if anyone knows if there are any rules for starting fires for Palladium games (whether it's Rifts, fantasy or modern)? Also, any extra environmental rules, such as the effects of bushfires, earthquakes, starvation/dehydration, etc would really help. I remember Rifts Canada had some extensive rules for the cold. Ideally if there was one book that had it all, that'd be best, but different books is fine too.
Thanks!
RD