This case study explores some of the health issues brought to light during the flooding in New Orleans caused by Hurricane Katrina. The case encourages students to think about a variety of problems that can occur when humans are exposed to unsanitary flood waters, focusing specifically on exposure to the heavy metal, lead (Pb). The case explores the use of lead in gasoline and how that continues to impact the environment today. Students learn a little about the fate and transport of lead as well as its toxicity. The case is intended for a non-majors environmental issues course, but it could also be used in an introductory biology, toxicology, or ecology course.