The bronchial tubes going into the spongy tissue that makes up the lungs are partially closed as a result of a reaction to something in the atmosphere or the environment of the asthma sufferer. Asthma is on the increase and the number of people becoming seriously sick, or even dying from it is also on the increase. The weather affects asthma through the way it moves pollutants and spores in the air around us. So if you are downwind from a chemical plant or a metal works you might easily be more liable to have trouble with your chest. In some places where the air moves very slowly there is a higher incidence of people with asthma problems.
Lightning causes asthma too by releasing spores from grass, trees, moulds and other plants.
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