Keeping the sun off my son

The angle of the sun's rays here in SP is much more directly into one's eyes, or is it the lack of trees and greenery to deflect and disperse them ? For whatever reason I find myself often having to turn Sam's buggy around and pull it behind me so as to keep him in the shade. An extra challenge as I fight the sidewalks and precipitous plunges from curb side to road and back again.