Five songs with 'rain' in the title, with some visual aids.
Four more behind cut
The go-to song for your Apocalypse fics.
And finally, on in lighter vein...
And on that damp note, I'll leave you to get ficcing.
Here is your next set of prompts, which are once more song titles (though, of course, you're free to interpret those titles, or the lyrics of the songs, or anything else connected with them however you please.