The possible effects of global warming in Egypt in the future

The Nile River:

Egypt’s Nile Delta is particularly at risk from sea-level rise, which would threaten freshwater resources, crop production, fishing livelihoods and encourage the spread of diseases such as malaria.The Nile (and almost every other river in the middle latitudes) will experience reduced stream flow. As temperatures rise, vaporization (transport of water from the surface to the atmosphere) will increase. In the high latitudes, that vaporization will be balanced by more precipitation (and so stream flows might even increase), but in the low latitudes that won't happen. There's not going to be much rain falling into the Nile Basin, and that means reduced stream flow, which will result in less agriculture, hydroelectric power, and drinking water for the region.

Less rainfall = less drinking water.
Less rainfall = less water for agriculture = famine.