I braved the heat today and went into downtown Phoenix with my camera. (and a large bottle of water)
This is a few pics of what I found, all of it within an area of just a few square blocks in the Roosevelt Row arts district.
Some is political, some is "tagging" (the artist's name, initials, etc), and some is pure art. (because I was in the arts district, I'm pretty a good bit of it is sanctioned by the property owners.)