We got a new house just a few months ago and we have a small jacaranda tree at the backyard. I love jacarandas, but never had one to learn how to care for them or how the yearly changes go. So from last week the leaves turned a yellow and brown color, which I am not sure if is just how they should look before falling (since it is end of winter) or if it is sick. I read about Xylella fastidiosa and got worried.
I put 2 pictures for reference.

What would you say? Is my jacaranda at risk? What should I do?