in that, they discuss controlled burning among other things.. they reference Dr Scott Stephans who was lead author on

'Drought, Tree Mortality, and Wildfire in Forests Adapted to Frequent Fire' February 2018 / BioScience

where it is stated, summary first paragraph :

Massive tree mortality has occurred rapidly in frequent-fire-adapted forests of the Sierra Nevada, California. This mortality is a product of acute drought compounded by the long-established removal of a key ecosystem process: frequent, low- to moderate-intensity fire. ... The scale of present tree mortality is so large that greater potential for “mass fire” exists in the coming decades, driven by the amount and continuity of dry, combustible, large woody material that could produce large, severe fires. For long-term adaptation to climate change, we highlight the importance of moving beyond triage of dead and dying trees to making “green” (live) forests more resilient.