I dreamed that my life was hanging by a thread in the elevator, but I seized the chance to survive, and then I received the news of my family's death while waiting for the accident.

It's okay. Dreaming is normal. Let me analyze it for you. At first, it was your dream. If you analyze it, you will survive and have a happy future. In your supplementary question, it means that you are often away from home, and it is essential for you to miss your family. You want to know the situation at home now. So you have the shadow of your family in your dream, and someone is thinking about it, so your brain reflects on your family in combination with the scene in your dream. So you don't have to think much about the dreams behind. So my understanding is: you will be blessed if you survive!