 To connect to the Atlantic and Pacific line in the quickest way possible, surveyors and engineers for the California Southern pushed the route through Fallbrook and Temecula—bypassing what was, at the time, the pueblo of Los Angeles.The railroad, however, didn't understand the nature of Southern California's dry washes.Local inhabitants warned the railroad of the dangers of building through such an area, that it could become a raging torrent of water, but the railroad built through the canyon anyway.