A spoof on "The Day After Tomorrow" married with the events of New Orleans after Hurricane Katrina.
This is the very last appearance of Nurse Gollum, she is briefly seen running out of the school screaming along with all the other kids and other staff members. In South Park: The Stick of Truth (2014), it is shown she went missing during the events of this episode (there is a missing poster of her in the police station). She is later replaced by a new nurse in Ass Burgers (2011)
At the emergency meeting in the state capital, upset attendees say "peas and carrots, peas and carrots". In season six " Child Abduction Is Not Funny" a crowd says "rabble rabble rabble". These are examples of 'walla'. Since the early days of radio folks have used certain phrases to simulate crowds and mobs muttering; famous examples are 'walla', 'peas and carrots', 'rhubarb rhubarb', and 'natter natter'.