Question: How can there be a famine in egypt?
Parshas Miketz and Vayigash discuss a famine in Egypt and the world. Rashi's comments to Eikev 11:10 that the Nile's annual flooding was critical for Egyptian agriculture as Egypt does not rely on rainfall (like the land of Israel).
How can there be a famine in Egypt? Did the river dry up?
I am looking for sources that discuss this concept.