I thought it was an interesting story. Sex workers more likely to be affected by climate change, because work outdoors, and less likely to get help, because sex workers. The case study had a happy ending, because sex worker became cake maker instead.
I don't see the relevance of them being trans, and the use of the word 'vulnerable' adds nothing. The story speaks for itself, unless you're talking about a particular subset of trans who are especially vulnerable, in which case you should explain why.