For many decades, the policy was to not do any prescribed burning and many downed trees and undergrowth was the result.
Add drought conditions and you have perfect conditions for out of control wildfires.
Trump is spot on
The water issue is primarily related to the damage the restrictions did to our central valley farms. None of the wildfires would have been impacted at all, although.. when we got hit by one, we successfully made a stand in the orchards at the edge of town. If there’d been no water to irrigate them they wouldn’t have been a barrier. So you could make that argument, but primarily he’s mixing up two different issues.