8For this reason her plagues will come in a single day, death and mourning and famine, and she will be burned up with fire; for mighty is the Lord God who has judged her.”
In the Greek the term translated as “for” (because) is a causal particle providing the reason for what was just said/described. The plagues of death, mourning, famine and fire will suddenly come upon Babylon because of the identity of the Lord God.
8 For this reason her plagues will come in a single day, death and mourning and famine, and she will be burned up with fire; for mighty is the Lord God who has judged her.”