There were only a handful of icicles hanging from the gutter drains but there were a couple hanging from the eaves about 10 cm towards the wall from the edge. This means that the gutter drain has flooded near that point. There is a cold storage room above a warm storage room on the side of the house where the overflooding has happened. The attic is quite easily accessible from the cold storage room. I will just have to take one panel off of the wall to have a direct view of the problem. I don't believe there has been much damage but I should install cables for the next winter.