I recently read an interview with Peter Gabriel in Mojo Magazine. His big break-out album So has been rereleased with special features. I bought So when it was new and have listened to it many times. “Red Rain” was inspired by a dream. The lyrics allude to that dream:
I am standing at the water’s edge in my dream
I cannot make a single sound as you scream
But that’s as far as the song goes. In the interview Peter Gabriel describes the dream more fully:
The sea [was] parted by two walls. There were these glass-like figures that would screw themselves into each wall, fill up with red blood and then be lowered across the sand … to the next wall, where they’d unload the blood on the other side.
source: Mojo #238, September 2013
source for lyrics: azlyrics