What does Houston smell like to you?

Now that the weather is cooler, I've had my window open more. I can always tell when the window has been left open because I'll enter the room and encounter a certain smell. A kind of wet dog/sour milk smell that could be anything from clay soil to oak pollen to leaf blower exhaust.

I think Bill Burr once said that Philadelphia smells like piss and fresh flowers. How would you describe the scent of Houston?