In this episode of Mapping Disaster, we explore the aftermath and impact of disasters such as the Halifax harbour explosion, one of the worst man-made disasters in history. Hurricane Katrina, a natural disaster that caused widespread devastation and highlighted the vulnerabilities of emergency response systems. The Listeria outbreak of 1985, and finally the Lake Nyos tragedy. Through these stories, we highlight the importance of disaster preparedness, the need for effective emergency response systems, and the ongoing efforts to prevent similar disasters in the future.