I know the movie, just I don't know the name so I will explain some of it. Family goes to vacation to Thailand and a tsunami hits and every one is all over the place. Boy finds mother, they find a small child, they get help to a hospital, at the hospital the mother's leg is extremely messed up, the boy is trying to bring back families. His two little brothers see him, they are together and then find the dad. I know I might have gotten some things wrong, but I am almost certain what movie you are talking about.