If you've been thinking every fire season seems more intense than the last, you are correct--at least for California. Researchers at the University of California-Irvine pulled in data from the last 100 years, and found some clear trends.
For one thing, every year of the 21st century has featured an increase in fire destruction over the previous year. For another, the center of fire season has shifted earlier; it's now in July instead of August.
We get an overview from the lead researchers: Professor Tirtha Banerjee and PhD Candidate Shu Li.