Because the shore of the Dead Sea is the lowest dry spot on earth, water can leave only one way ​ — through evaporation, which can reduce the sea level as much as one inch [25 mm] a day in summer.
Kuna Surnumeri on kõige madalam koht maismaal, kaob vesi sealt vaid aurustumise teel. Suvel võib Surnumere veetase alaneda 25 millimeetri võrra päevas.