Im a wldland firefighter from the northern Rockies, just returned from a deployment to the Woolsey incident (LA and Ventura counties).

Yes, prescribed burns are common in the off season for all fire districts. However, CalFire has some unique challenges [1] that most of the other states do not have to deal with when it comes to air quality and sufficient water conditions during their shrinking off season. https://www.kqed.org/science/1927354/controlled-burns-can-he...