Lake Oroville dam: emergency staff race to fix spillway before more rain strikes

• Bags of rocks loaded on to helicopters to fill gap created by erosion
• Emergency repairs come a day after nearly 200,000 were evacuated

Emergency workers and state officials were racing on Monday to repair a damaged spillway on the tallest dam in the United States, while almost 200,000 people evacuated downstream of the structure were given no indication of when they might return to their homes.

Related: Lake Oroville dam: mass evacuation ordered over flooding threat