I agree. When I was marching one of my tribes through the Savannah I realized there were fires at every port, so we had to wait and starve a bit until the flames moved. This is somewhat similar to an idea I had to stop the fires. When I was playing I made my Nichelings destroy all the grass in a 2 tile radius all around the fire, but it kept burning. I was hoping that they would add some kind of system where you could destroy 2-5 grass tiles and the fire would at least stop spreading...