Table 2. Characteristics of documented epidemics of thunderstorm-associated asthma
There is a link between asthma epidemics and thunderstorms
The epidemics related to thunderstorms are limited to seasons when there are high atmospheric concentrations of airborne allergenic pollens
There is a close temporal association between the start of the thunderstorm and the onset of epidemics
There are not high levels of gaseous and particulate components of air pollution during thunderstorm-related asthma outbreaks
Subjects with pollen allergy who stay indoors with the window closed during thunderstorms are not involved
There is a major risk for subjects who are not receiving anti-asthma treatment but subjects with allergic rhinitis and without previous asthma can experience severe bronchoconstriction
There are no observations on the involvement of asthma in nonallergic subjects