Yes, "Inescapapble Rain" is part of the two-disc special edition version of the SH4 soundtrack. It is a narrative written by Akira Yamaoka in a Silent Hill-esque style genre and performed by Ichiryusai Teisui, one of Japan's "living national treasures." Unfortunately, the text cannot be translated exactly into english because of the "kodan" style in which it is told. Doing so would ruin the experience of the piece. It is and will probably remain a Japanese-only exclusive. Even the title may be only a rough translation.
Well... I'm sure a translation would ruin it... however it'd still be nice to know what's going being said. It's beautiful the way it is... I just want to know the gist of what's said.