What happens to the supply of food when there is a disaster or a calamity

What happens to the supply of food when there is a disaster or a calamity? 

Answer: In case of a disaster or a calamity, the food supply gets interrupted. Many people come in a position in which they may have to go hungry. 

The buffer stock from the FCI is utilised in those situations to provide food to the affected people. For example; food packets are dropped in flood affected areas.