City of Sacramento School Field Trip
Migration to California accelerated during the early-20th century with the completion of major transcontinental highways like the Lincoln Highway and Route 66. In the period from 1900 to 1965, the population grew from fewer than one million to become the most populous state in the Union. In 1940, the Census Bureau reported California's population as 6.0% Hispanic, 2.4% Asian, and 89.5% non-Hispanic white. The 1906 San Francisco earthquake and 1928 St. Francis Dam flood remain the deadliest in U.S history.