disasters like that happen all the time. the prediction is too vague to be considered as an actual psycic prophecy. if he gave the date, time, location, nature of diaster and death toll then it would be more probable that he made an actual prediction.
a lot can happen in 3 years. its almost like saying "it will rain in scotland sometime between 25/09/05 and 1/10/05. although any scottish person will tell you that its likely to rain on every single one of those days.