Heat dome is real. Also if you had water run off that cooled beneath the roads and sidewalks etc that would help a lot .
I'd love for cities to tear up empty parking lots, require new parking lots to be shaded etc
Besides for the heat, trees done right can as I mentioned, absorb carbon, clean the hair and absorb water .
The other issue of earths groundwater problem, I think is beyond just excessive pumping, there's often no where for water to go when it rains