What do you think the author Kevin Barry meant when he says fattening light in this given context:
It was by now a hysterical downpour, with great sheets of water steaming down from Mweelrea, and the harbor roared in the fattening light. Visibility was reduced to fourteen feet. This all signalled that the West of Ireland holiday season had begun.
Does it mean as something like "fertilizing"?
This is the link to the full story I'm referring to, "Fjord of Killary" in the The New Yorker: http://www.newyorker.com/magazine/2010/02/01/fjord-of-killary