 The film is narrated by actress Meryl Streep and driven by a jazz-, blues-, Cajun-, and gospel-fueled soundtrack featuring Tab Benoit, Amanda Shaw, Mavis Staples, and Allen Toussaint.It was originally a "what-if" scenario about a major hurricane impacting New Orleans – prior to Hurricane Katrina.The film debuted at the Entergy IMAX in New Orleans, on the one-year anniversary of Hurricane Katrina, several months before being shown elsewhere.