See our new paper using 16 GCMs to project future changes in fire probabilities across the planet:
Moritz, Max A., Marc-André Parisien, Enric Batllori, Meg A. Krawchuk, Jeff Van Dorn, David J. Ganz, and Katharine Hayhoe. 2012. Climate change and disruptions to global fire activity. Ecosphere 3:art49.