Dying branches

[Torco]

One of my Durga Mata's has a few branches on it that wilt and die; I have never had this problem before with outdoor plants. My PH pen is broke so I have no idea what the PH is, there are no signs of pests in my garden. Im stumped why they are dying like this, the plant looks very healthy. Any help would be greatly appreciated.

This branch is the one thats dying now. you can see 2 others below that one that already died.

The only other thing i can think of is its so hot here the top soil is drying out to fast and if there are any roots in that top soil they get to dry and die, i water every 3 days.

 

[Boss]

I had mentioned replacing the black wrap with white around those pots. I think the roots are getting very hot.

I went to a neighbors house that have painted thier front door black. When the sun hit the door, it was sooo hot you could not touch it.

Maybe replace it with white to reflect the heat?