The migrants who lost their land and livelihoods to the Dust Bowl and headed to California were generally called Okies, Arkies, or Texies. These individuals faced great economic struggle due to the environmental problem and the overall economic impacts of the Great Depression.
The bank lending slow down led to the collapse of US and global stock markets. The financial system is basically interconnected due to the forces of globalization and technology. A slowdown in one sector quickly leads to a slowdown in others