 This was a period when many African Americans migrated in the second wave of the Great Migration from Texas and other parts of the South to the West Coast, where a buildup in the defense industry provided more job opportunities.Other minorities settled in the county during its residential development, and African Americans are now a minority.As of the census of 2000, 354,452 people, 110,915 households, and 93,057 families resided in the county.