Dales et al. 2003. Six years of emergency room visits for asthma were
analyzed to determine the effects of thunderstorms on asthma. Daily hospital
admissions for asthma increased 15% on days with thunderstorms. Total spores,
ascospores and Cladosporium spores also increased during thunderstorms
and were associated with increases in asthma. The authors conclude that a
relationship exists between thunderstorms and asthma and suggests that
increases in fungal spores are the factors responsible.