I am unsure how to be interpellated as a subject as I am at once a lifetime contributor to climate change in CA as well as a current/potential victim of this cascade.
In all honesty, prior to reading the text I was unsure how to digest this image. The center image of the dominoe seemed to stand out (though on initial reading not in a way that was signifing of how to "read" the image). I then noticed the varying charts and wondered if (how) it was important for me to understand the graphic details of the charts within the image.
In light of the inspiration from Piet Mondrian, I would suggest it would be helful to quite literally add a "frame" to the image (i.e. a black framing as seen in Mondrain's work). This would add a bounded starcture to the image that I think would signify it's completion (though, perhaps you chose to not add a framing for the intenional reasons, such that we are unsure of the direction or path of the cascading disaster of climate change).
I would describe this image's subject as climate change. I read the image in line with the "follow the thing" approach to ethnography in which following climat echange in CA allows for the production of this visual cascade.