Westerling et al (2006) Warming and Earlier Spring Increase Western U.S. Forest Wildfire Activity Science, vol. (landscapesandcycles.net)
Westerling, A. L., Hidalgo, H. G., Cayan, D. R. & Swetnam, T. W. Warming and earlier spring increase Western U.S. forest wildfire activity. (nature.com)
But cooler, more moist forests, such as those in the northern Rockies, have seen the greatest drying due to changes in the timing of spring, and the greatest changes in forest wildfire. (theconversation.com)