This material was developed prior to coronavirus (COVID-19). Follow current coronavirus (COVID-19) directions for physical distancing and wearing a face covering when you leave home.

Melbourne experienced the world’s largest epidemic thunderstorm asthma event on 21 November 2016, with thousands of people developing breathing difficulties in a very short period of time. Following this event, the Department of Health and Human Services developed a multi-faceted, comprehensive Epidemic Thunderstorm Asthma Program to address potential future impacts.