I know this article is 4 years old, but I am just now reading it. It is a Pulitzer Prize winning article about the dangers of hyperthermia, and it goes into detail about how it happens to people who least expect it, and gives some suggestions for how to prevent. Recently I've been having this recurring fear of forgetting LO at home or at a store (I've never done this, but for some reason I still have the fear). So this article is timely for me.

http://www.washingtonpost.com/wp-dyn/content/article/2009/02/27/AR2009022701549_5.html?sid=ST2009030602446

Warning, it isn't a fun read. But I think it is a really important read!