There is a famous story that a woman had two daughters. One was married to someone near the bank of a river, and other was married to someone living in a high altitude area.
The woman was always worried that one of her daughters would die. If it rained too much, then the one living beside the river will die, and if it did not rain, then the one living in the high altitude area will lose her life.
Same would be the condition at the advent of the Hakam [Judge].
(Malfuzat, Vol. 5, p. 32)