Nope, it's not a trick of the light. This gate really is blocked by a blooming bougainvillea bush! I guess the homeowners use only their garage door or they have been on vacation for a long, long time!
I'm a transplanted New Yorker who loves the Tucson climate. On New Year's Day I have a bit of fun calling my (snowbound) east coast friends to announce that I'm drinking coffee while sitting on my patio. (: