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...
I'll add statistics for the 2018 fire season that includes southern and northern California [1] at a combined 55,000 acres versus the northwest (WA, OR) of a similar geographic size [2] and atmospheric conditions to Northern CA at over 100,000 acres in prescribed burns.
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...