You can't tell by the light because even though dusk comes a little earlier each evening, the quality of the light has not yet changed.
You can't tell by the scent in the air. It's much too hot and dry to burn here.
You can't tell by sounds, because the cicadas and treefrogs have not yet started tuning for their autumn concert.
But the sumac and poplars are "leaving" Subtle hints.
Things will begin to change in the coming weeks.
