A Whoosh of Water! is a magazine story.
One morning, Percy is struggling with some trucks loaded with cans of water for the signalboxes along the line. Meanwhile, Bill and Ben are returning from Brendam Bay with trucks full of china clay. Suddenly, a large gust of wind blows dust from the trucks all over the station's platform which had been freshly cleaned ahead of the Mayor's visit. The Fat Controller is not cross with Bill and Ben, but is concerned about the mess. The staff rushes onto the platform with mops, buckets, and brooms, but they knew they would not be finished in time.
Shortly, Percy is heading towards the platform with his very troublesome trucks. The trucks rattle about and Percy brakes sharply in order to give them a bump. Unfortunately, the water cans roll out of the trucks, the lids come off, and the water splashed across the platform. The Fat Controller is not cross at all. Thanks to their little accident, Percy and the trucks had cleaned the platform in record time.