Personally I think this is purely a "works on paper but not in practice" scenario.

The issue is that the intersection of "people who live in greener neighborhoods" and "people who cant afford air conditioning" is very very very slim.

What will happen is as you go and plant more trees, shortly after property values in that area will shoot up and make it less affordable.

So the only people who benefit in the long run are those who were already well off in the first place, resulting in the lower classes (the group most heavily affected by heat waves) not gaining any of this benefit at all.

The upper class will just further cement their upper class'ness, and you'll just have the nicer neighborhoods becoming even more nicer, and the medium neighborhoods becoming gentrified and elevating to nice neighborhoods.