Thunderstorms can worsen asthma and allergies
From The Washington Post:
Allergy sufferers often wish for rain, hoping it will wash away all the pollens and molds that stuff up their noses. While rain can indeed provide relief, a violent thunderstorm may have just the opposite effect: An unlucky few may experience a little-known threat called thunderstorm-related asthma.
Not fully understood by scientists, thunderstorm asthma can cause labored breathing for those with asthma and with allergies - including some who have never had breathing difficulties before. Read more.