Why were the roofs of Egyptian houses flat? How does this relate to the climate?

This explains the fact that the climate in Egypt was quite dry, with a low percentage of rainfall. Also, flat roofs offer minimal resistance in strong wind gusts. Although it cannot be said that the dry climate in ancient Egypt was also the reason for the low fertility of the land. In those days, the Nile River made the surrounding land very fertile, which made it possible to collect large harvests.