Nice shots
Remember the old saying....
Red sky at night, shepherd's delight,
Red sky in the morning, your house is on fire
TBH I've seen a lot more dramatic sunsets. Random bit of a tree / bush line doesn't make for a very interesting focal point and sky is just sky. If you wanted to make it look like the sky is really on fire you could increase the blacks and shadows in the image.
Like the first one, is that the moon popping out?