I am an expert on the following because I have witnessed it 3x in the past weekend

It's pretty sweet when the sky prepares to unleash hell and storm all over Lyon. First the normal stormy things happen, like clouds roll in, distant lightning and thunder. But then it starts getting really windy and all this pollen and other random little shit starts whirling all around. Everyone starts hurrying. Parents cover their babies' cute faces and good boyfriends let their girlfriends nuzzle their heads in their shoulders. Everyone starts sniffling and sneezing and wiping their eyes. If you have sunglasses you wear them. Hurry hurry hurry before it starts to pour! And if you get caught in the storm, the biggest raindrops you have ever seen will rain on you. Then you are wet and still trying to get all that crud out of your eyes and your throat and it is brilliant.