The link below is to an interesting site that has historical information pertaining to the book The Grapes of Wrath. The link goes to an article about the "Okies" who were people that migrated from Oklahoma to California and other Western states. It also explains why these people moved and also the problems they faced once there. This is not all that is on this link if you look at the right of the page once clicking the link it also has another article called "The Dust Bowl." This goes in more depth of exactly what areas were affected by the drought and why.