It's impossible to consider The River in Reverse without taking the devastation Hurricane Katrina wreaked upon New Orleans into account. Indeed, it's quite likely that this collaboration between Elvis Costello and Allen Toussaint would not even have occurred if it weren't for that cataclysmic event. They've collaborated before – Toussaint wrote horn charts for Costello's 1989 album Spike – but neither had plans to work together until they appeared together at several benefit concerts for the victims of Katrina in September of 2005.