I recently reviewed Edward Kohn's Hot Time in the Old Town on H-Net's SHGAPE network. Here is the link if you are interested: http://www.h-net.org/reviews/showrev.php?id=33113.
Hot Time in the Old Town covers New York City's killer heat wave of 1896. Over 1200 people by the author's account. It reaches a little bit in claiming that the heat wave killed William Jennings Bryan's campaign and inspired Theodore Roosevelt's progressivism. Otherwise, this is an enjoyable and interesting read. The best part was in how it connected the lives of individuals, especially
tenement dwelling immigrants with the urban environment. Although I reviewed this for the Gilded Age and Progressive Era network, this book could work well for an environmental history course.