he told The Sun."Storms cause great movements in the air, both bringing pollen grains down which might have otherwise risen above head height out of harm's way, and whipping up pollen grains and fungal spores near the ground."To make matters worse, farmers will often work hard to get their fields harvested before a storm which further increases the level of allergens in the air."And don't think that living in the city will spare you from this either - the thunderstorm can pick all this pollen up and carry it for miles before dumping it at head height in the city."Although thunder fever is not a scientifically proven illness, many asthma sufferers have reported worse symptoms during stormy weather.