byAmerican College of Allergy, Asthma, and Immunology

Credit: CC0 Public Domain

A new study finds that thunderstorms can trigger sharp increases in asthma-related emergency department (ED) visits, underscoring the importance of storm preparedness for people with asthma. The research is being presented at the2025 Annual Scientific Meeting of the American College of Allergy, Asthma and Immunology(ACAAI) in Orlando and is set to appear inAnnals of Allergy Asthma & Immunology.

"Thunderstormasthma" is a well-documented environmental phenomenon internationally, but studies in the United States in areas with heavy pollen have been limited. According to the World Allergy Organization, thunderstorms are considered a risk factor forasthma attacksin patients suffering from pollen allergy.

Researchers analyzed 4,439 asthma-related ER visits across three Wichita, KS hospitals from January 2020 to December 2024. Using meteorological records, they identified 38 thunderstorm days during this period.

Key findings included:

"These results confirm that thunderstorms can pose a serious health risk for people with asthma, even in the United States," said Diala Merheb, MD, lead author of the study. "Because storms are unpredictable, patients andhealth care providersshould include storm-specific precautions in asthma action plans."

The researchers note that storm-related surges in asthma cases place a significant burden on emergency departments. By recognizing the connection between thunderstorms and asthma exacerbations, communities and health care systems can develop preparedness strategies to protect vulnerable populations and reduce strain on hospitals.

Says allergist Selina Gierer, DO, ACAAI member and one of the study authors, "If you or your child has asthma, it's smart to think aboutthunderstormsthe same way you prepare for high-pollen days or cold weather. "Understanding triggers and having a clear plan can help avoidemergency room visits."

More information: Thunderstorm-Associated Increases in Asthma ED Visits in a Midwestern US City: A Five-Year Review, Annals of Allergy Asthma & Immunology (2025).

Provided by American College of Allergy, Asthma, and Immunology