Here is precise location on Google Street View, you can see it on the right.
The sun has rolled along the horizon where it has encountered the water tower blocking its path. The sun no longer can mover horizontally, and so it has to sink below the horizon.
The tower is a free-standing cylinder. It has a rather thick neck and cylindrical top. The trees are still mostly bare this time in Texas. The blue sky and luminous orange make for a nice sunset.