What natural disasters and environmental conditions can cause famine?

Famines are often precipitated by a variety of natural disasters and environmental conditions that disrupt food production and supply chains. These factors include:

• Drought: Extended periods of rainless weather that lead to significant water imbalances, causing crop damage, reduced yields, and the depletion of livestock supplies.123
• Extreme Weather: Events such as flooding, unseasonable cold, and typhoons can destroy harvests and impede the distribution of food.12
• Biological Threats: Plant diseases—such as the late blight that caused the Great Famine in Ireland—along with insect infestations and vermin depredations, can devastate essential food crops.142

While these natural factors are significant, it is important to recognize that human actions often exacerbate these conditions. Warfare is the most common human cause of famine, as it involves the deliberate destruction of crops, the use of blockades, and the disruption of transportation routes. Furthermore, social and political systems can transform localized food shortages into widespread starvation by failing to manage resources or distribute food effectively.12