As long as the foil packets around the film are intact, they should be ok... Open a sample roll and see. I had a shoot that I did once, where I had to ford a river (fairly shallow) carrying my Hasselblad kit in a well-sealed case. I had my film that I had just shot in my hand. I slipped on a rock, and the case, and my hand carrying the film, went right into the river. The case (a lightware case) never leaked a drop, but the film was fully immersed. I ran home to process it, and it turned out just fine even though it was at least an hour from the dunking to when I got the film in the soup.