With the population of the earth at an all-time high, a major drought in the third world could easily result in mass starvation. It says in the Bible that a measure of wheat will cost a penny. In the first century, a measure of wheat was equal to a single loaf of bread and penny was a days wage. A person would have to work all day to afford one loaf of bread.
“And I heard a voice in the midst of the four beasts say, A measure of wheat for a penny, and three measures of barley for a penny” (Rev 6:6)