The trees are in full technicolor swing. The land is slowly dying, and not just because it's Fall [1], we're also in the middle of a prolonged drought -- this year being one of the worst -- but this year the leaves are opting for a James Dean-style, leave-a-good-looking-corpse exit. If you're a leaf and you've got to go, do it with class.
It's part of the trade off I guess. My Los Angeles friends aren't running their heater and still wearing a sweater. It gets cold here, not as cold as New England, but certainly colder than coastal California. But I'll take the cold in exchange for some tangible markers of the passing seasons, the passing time, lest it simple blur together and slip away invisibly.
Just bear in mind that only part of it is passing. As a friend of mine used to say, the leaves fall for the tree every year, but the tree will never fall for the leaves.