Famine in 1943 caused a great impact on Bengal, it resulted in the deaths of some three million people due to malnutrition or disease. This was during the rule of British.
Many famines are the result of food shortage, but the Bengal famine did not coincide with any significant shortfall in food production. Some stated that, the famine was the result of an entitlement failure. In other words, the distribution of the food supply throughout Bengali society was hindered. That affected the ability of certain groups of people to purchase food. In the midst of World War II, rice exports from many countries were halted. And there's also a cyclone in 1942 which worsened the situation. During the war, rice export became increasingly in large amounts which resulted in deaths of millions of people due to malnutrition and hunger.