Ponciana Tree - Crown seems to be dieing
We have a Ponciana tree which over the past few weeks appears to be dieing from the top. Conditions lately have been extremely dry, with cold nights and warm days. The tree is located just East of Brisbane, Australia, to give you an idea of the climate in the area, and it is approximately 8 years old.
The lower branches of the tree still appear to be healthy and the leaves are green.
I have uploaded two images of the tree and the affected branches.
Any suggestions as to what might be causing this, or how to fix the problem?