Can a dream of children dying come true, knowing that the dreamer has previously had dreams that came true, and she fears that this terrifying dream will come true, especially since she is now living in the same place she saw in the dream?

The interpretation of a dream is not necessarily its literal manifestation, nor does every dream come true. A Muslim should exert effort in taking the legitimate means to protect himself and his family, entrust the matter to Allah, and have a good opinion of Him; for Allah is the best protector.