California regulators say self-driving automobiles arent smart enough yet to zip around town without a driver ready to take the wheel.

California Gov. Jerry Brown signed a pact with 11 U.S. and international states aimed at curtailing temperature increases caused by carbon pollution.

Washington Governor Jay Inslee declared a drought emergency, citing historically low snowpack and dwindling rivers.

A severe drought grips almost 40% of the West.

California Gov. Jerry Brown said residents must reconcile themselves to a more arid way of life to endure a historic drought.

California Gov. Jerry Brown said residents must reconcile themselves to a more arid way of life to endure a historic drought.

California regulators approved rules that for the first time require mandatory water reductions across the state as a historic drought gripping the region enters its fourth year.

California has proposed rules calling for mandatory reductions in water use by municipal agencies.