Do you know what kind of bush it is?
I could be more helpful if I knew.
If you can post a picture that would be great.
If it's not a serious disease issue you may be able to just prune off the dead wood and let the bush grow back out.
If it is a disease you will want to remove the whole thing it before it infects more bushes.
I'm guessing, since you are from Beaumont, it is probably drought stress, and with deep watering and some fertilizer it should grow back.