It's a process with stages: melting (where ice is available) -> evaporating (if there is water) -> burning (of the dry forests when there is not enough water) -

It's a process with stages: melting (where ice is available) -> evaporating (if there is water) -> burning (of the dry forests when there is not enough water) -> desertification (of the barren land when water, forests and other vegetation are gone). But yeah, Arizona is mostly already in the final stage, and I guess you can't really compare the speed across all stages anyway.