I think if you are a child and you are trying to develop correctly that anything can disrupt it for you. Everyone is unique and because we are unique we need to have parents who are attentive to our specific needs. I have 2 children who are very different. I do not treat them the same. I treat them depending on what they need at the time. It is basically having an attentive parent. I don't think that disasters can affect your development unless you have an inattentive parent who doesn't address your needs that resulted because of the disaster.

From what I have read about BPD, it starts with a sensitive or vulnerable child and then you add an invalidating environment for them. You might not have been abused at all but if your parents played mind games with you or just didn't know how to help you, so that you couldn't make sense of the world and develop properly you can still develop BPD. A less sensitive child can adapt to an invalidating environment. I have one very sensitive child and I thank God that I have worked through my issues and have the ability to help her develop correctly because in my opinion she would be the perfect candidate for BPD if she was in a bad environment. I have helped her make so much sense of the world and how she needs to interact with it.