Every September, there is a spike in asthma-related ER visits and hospital stays. The Asthma and Allergy Foundation of America explains what causes this asthma peak and what to do to protect your and your family's lung health.

Melanie Carver, AAFA's Chief Mission Officer, talks about how fall seasonal allergies, extreme weather and fires, respiratory infections, and school building environments all influence the asthma peak this time of year.

With millions of children returning to school, the time to take action is now.