Verses 6-12 repeat for a second time and give more detail about how Noah went into the ark with his family and the animals in [Genesis 7:1-5](./01.md). This is not a new event.
This phrase is used here to mark an important event in the story: the start of the flood. If your language has a way for doing this, you could consider using it here.
The implicit information, "it started to rain" can be made explicit. AT: "it started to rain and the waters of the flood came upon the earth" (See: [[rc://en/ta/man/translate/figs-explicit]])