More properly, it was in the air yesterday, and today's it largely on the ground.
At one point in the afternoon, the leaves were falling so thickly that I couldn't see the street from the house. I tried to get a short video, but - of course - it was tapering off by then. (Note: if you click on the video to enlarge it, you can see the leaves falling much more clearly.)
This photo, taken just now, is after I spent over an hour moving leaves from the 260' driveway this morning.

As you can see, the birch trees are largely bare. The cottonwoods retain their leaves, for now.