"Can you make rain with permaculture" is this topic:
I say yes you can and it is very easy:
Stop thinking the tree I would like to plant will not make a change against the expanding drought
Start thinking MY tree I just planted is the tripping point from drought to rain
and if there is not difference plant one more, persuade your neighbor by gifting him/her a tree that will be the tripping point and let him/her continue to do this until all see the first cloud since many years...
actually so simple, isn't it?
Hence
the answer is: "Yes you can make rain with permaculture"