The term '1930s Migrant to California' refers to the Okies, a group of people who migrated from the Dust Bowl region of the Great Plains to California during the 1930s. The Dust Bowl was a period of severe dust storms that caused major ecological and agricultural damage to American and Canadian prairies in the 1930s. The Okies were farmers and their families who were forced to leave their homes due to the environmental devastation caused by the Dust Bowl. They traveled to California in search of better economic opportunities and a better life.