our experience from The Great Thaw of Feb 2010, you can never be sure. What happened was that one of several ⌀=30cm drain pipes got choked at the uphill end and the water spilled out into the lane itself, ripping great clefts and gullies through it. It has been a concern of mine ever since and last Winter I did something about my anxiety by building a single concrete block dam [shown R] upstream from our longest under-gateway pipe to catch any gravel in the rushing water and allow it a little time to sift to the bottom of the deluge. When it was almost too late, I remembered to open a 2-3cm drain-hole at the bottom of the dam so that any water can seep out of the silt. This most recent storm is really the first time when I had a proof of principle opportunity and, at 0600 yesterday, I was heartened to see the sump was almost brimful with road-sweepings:
Later in the day, we were comparing notes with Dau.II in Cork. She had been looking at the same storm from her grand-stand view on the 4th Floor above Union Quay in Cork City centre. She called to make sure her parents hadn't been struck by lightning. Apparently a couple in Cobh had their house take a direct bolt which blew all the electrical sockets and light-fittings, but also also knocked a mirror and a fitted wardrobe off the interior walls . . . and left a smoking hole in the ceiling. Terence [or Terrance] Alcock, the man of the house, attributes his survival to the fact that he was wearing rubber sandals. I share this with the Interweb, in case the news of this miracle didn't reach Ukraine.