The contrast between your fall there and what happens in most of Texas is stark. I know people who drove somewhere every year to catch the fall colors on the trees. Those same people stayed in Texas for a drive to see the wildflowers. Even my red oaks and Virginia creeper aren't consistent about having color and only do it occasionally. I'm guessing they'd be more consistent if they were exposed to a longer period of cooler days and night be a freeze. The first freeze tends to be abrupt here, going directly from very warm to some hours below freezing. Then the leaves just turn brown instead of having the color. I'm really enjoying your photos.