Certified GKH Gardening Expert
If others in the area are looking as your are, I would say that it was an environmental factor. Unfortunately, that would take more than a lifetime to change. Typically, they sustain much of their damage when the temperatures are a little cooler than usual, as they are not tolerant to the cold.
The only thing that you can do is to help provide it with the proper care, until the conditions are more favorable.
Here is an article that will help you with their care: