Added to the man-made financial problems were natural ones. A series of droughts in southern mid-western states like Kansas, Oklahoma and Texas led to failed harvests and dried-up land. Farmers were forced to move off their land: they couldn't repay the bank-loans which had helped buy the farms and had to sell what they owned to pay their debts.
Many economic migrants headed west to 'Golden' California, thinking there would be land going spare, but the Californians turned many back, fearing they would be over-run. The refuges had nowhere to go back to, so they set up home in huge camps in the California valleys - living in shacks of cardboard and old metal - and sought work as casual farmhands.
