You will need to go to the National Center for Biotechnology Information website to obtain the article, "In Katrina's Wake." Have your class read it and examine maps of where toxic chemicals were located in Louisiana at the time, taking note of the health concerns that have arisen as a result. A worksheet guides learners through the exercise. Although the hurricane occurred in 2005, the instructional activity is valuable as an example of a public health issue or an examination of the aftermath of extreme weather phenomena.