sorry for your loss friend.
looking at the setup though... aside from your wiring setup (which looks far too condensed)... all you needed were spacers between the rigs and I think you'd have been OK...
I have 4 inches air gaps between each of my own rigs, after having 2 together and almost instant shutdown due to overheating.
You don't have big fans blowing air towards units.
I have an aircon unit blowing cold air towards the rigs, not hot humid Thai air.