Sentence:  Because of this general situation, namely, the factor that thousands of citizens in California because of evictions and suspension of income were forced to move into squatter camps, and that these squatter camps were to some extent used by the state and county for the  purpose of segregating the destitute unemployed, many such communities were actually in existence in California by 1933 when the <WSD>dustbowl</WSD> influx began to make itself felt in this state. 
Meaning of the word marked with <WSD> tags:  The central region of the United States during the 1930s.