Its wet when it rains

Why does it always rain just as students are dismissed! It seems to be a karmic universal rule.  Today and yesterday the heavens opened just prior to 3.30 and down came the torrents.  Kids rushing for cover, people dashing around under umbrellas and cleaners mopping up the walkway near the bus stop and one bloke just staring at the rain running down the drain and into the pond as if that was his job to make sure the water went in the right way.
By  4.00pm it was clear, but wet underfoot.