Neighbouring Buckets

I spied a curious assortment of objects in my neighbour's front yard when I was going for my evening stroll. When I moved in for a closer look, I saw that he had constructed himself a makeshift water catchment on his lawn. Garbage bins, buckets, and even upturned umbrellas were laid out in a very carefully considered fashion. I was startled by the sound of a voice; my neighbour had appeared from the garden with two more buckets in hand and was muttering to himself. Unable to hear what he was saying, I opened his front gate and approached him. He seemed blissfully unaware of my presence, and I was able to listen to him for a brief period. It seemed that he was chanting to himself; repeating one phrase over and over, "When it rains."

Done