I checked the elevation map and determined that this has got to be some sort of extremely severe flood map. I rammed the Dutch through translate and decided it had to be some sort of reference to a love story dealing with flood-caused separation (I don't actually remember why) which, judging from its placement on a political poster, had to be super well-known. With the speed everything was going at first, I thought I needed to match that (in hindsight I did not) and so I hastily did some inspect-element on some British tabloid to make some clickbait about this love story. Not my best work, definitely not.
And so I handed it over to
@Gary Oswald