While I was driving home tonight, it was raining heavily. We live near the top of a hill so there was a lot of rainwater flowing down the road. The drainage grids seemed to be at full capacity and there were a lot of deep puddles on the road.
The water from up the hill was flowing down within the drains at such a rate that I saw a fountain of water coming up in the middle of the road, in a similar fashion to an artesian well. The fountain was only about 3-4 inches high but it was an unusual sight. It was far too wet to stop and take a photo.