There's a different sort of drought plaguing California, the nation's largest farm state. It's $38 billion agricultural sector is facing a scarcity of labor.

Migrant workers weed lettuce seed plants at an organic produce farm near Fresno, California.

"This year is the worst it's been, ever," said Craig Underwood, who farms everything from strawberries to lemons to peppers, carrots, and turnips in Ventura County.