Funny you mention that...we talk to our kids about this all the time. Isaiah 24:1-6 almost lead me to believe that Yellowstone is going to blow and we may have to flee North America. Not to mention if the Lord causes a Polar Shift...
I have come to believe that nuclear war will happen. It will happen because there are no true believers left in the cities. Fires in baskets (nuclear warheads) will be carried by giant scrolls (ballistic missiles) and entire cities shall be burned to the ground.