There is a LOT of overgrowth. Expect a decade+ of fires, or an apocalyptic firestorm which burns everything to cinders. Neither is awesome.

Climate change is defined by both wet and dry extremes.

Excess rainfall creates an explosion of brush that during the now annual drought turns to tinder.

Then come the floods because the roots were holding all the soil in place and the soil was managing water movement. What used to be an all year trickle becomes an occasional deatructive deluge.

True, but disingenuous, as "over" growth implies a normative cap, but climate change just is moving the cap lower. The ceiling is falling: more and more growth, in every biome, counts as overgrowth.

Eventually only desert remains viable, and everything above it, including arability, is locked away forever.

canada's forest is growing, not shrinking. the overgrowth will keep growing year over year