Since déjà vu is all about familiarity of incidents occurred in the past,it might be related to dreams. However there is no solid proof in this statement. It is a psychological phenomena and there are many theories to it. read more
His studies found 12.7 percent of his subjects' dreams to have similarities with future events. Recent studies, including one by Nancy Sondow in 1988, have had similar results of 10 percent. These researchers also tied evidence of precognitive dreams to déjà vu experiences that occurred anywhere from one day to eight years later. read more