Turmoil and Tragedy in California
The Grapes of Wrath story reaches its climax when the Joads get to California. Granma Joad passes away soon after the family reaches their destination. The family starts to split up, as the oldest son, Noah, leaves, and Rose of Sharon's husband, Connie, leaves her (and her unborn child) behind.
The migrants who are already in California are not friendly to any new competition for mostly nonexistent jobs. The major employers have figured out that the best way to maintain order among the workers is to keep them too poor to have time to organize, and so wages for a day cannot feed a family -- even for a day. Camps called "Hoovervilles" (derisively named after President Hoover, who was in office when the Great Depression began) have sprung up all over California, and it is one of these that Jim Casy gets arrested for punching a sheriff agitated by Casy's desire to start a union.
Even finding a government-operated camp doesn't help the Joads get a break. The local authorities want the camp to go away, so they set up a riot, but Tom gets wind of it and tells the camp leadership. However, Tom gets sucked into Jim Casy's drive to organize workers, and when the police shoot Casy for organizing workers, Tom kills a policeman and has to flee.
The Joad family quickly deteriorates from this point. The family has to live in a boxcar, which becomes dangerous when flooding rains hit that part of the state. Ma finds a barn for the family, and this is where the novel ends: Rose of Sharon, who had lost her baby but can still provide milk, nurses a starving man, but there is nowhere for the family to go once the rain ends.