As the rain of the winter fills up the underground storage, the level of the ground water rises. All of a sudden the little house look sort of endangered. We never see any inhabitants wave their arms from the ridge of the roof though. This is sort of an annual event.
This is the flat meadows around the river Marne. These days most of the trees around the river dip their feet in the river water too. The road between the villages Chouilly and Louvois is because of this built on a dam, and the construction must be satisfactory, since I've never seen it flooded.
The meadows on the other side of the dam must be a bit higher, since they're still green rather than flooded.