Living on Flood Tides (слэш)

AU after 5x22: Sam mysteriously returns from the cage and Dean thinks their problems are solved. Unfortunately, Sam is so shaken from his time in Hell that he can't—won't?—even talk to Dean, and when natural disasters begin to occur as frequently as they did when the Devil was walking the Earth, Dean realizes his brother may have acquired some of the angel's powers without picking up the ability to control them. In order to prevent Sam from hurting anyone, Dean finds a house as far from anything as he can manage and settles there to wait until the day Sam gets better—or until they both get killed by Sam's grace.