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The rain has started to return in Northern California and will continue over the next few days, but officials aren't as concerned about the upcoming weather so much as the damage already done to the Oroville Dam's already compromised main spillway.

The risk of flooding has dropped substantially, but Butte County Sheriff Kory Honea warned residents Wednesday that they remain in "an emergency situation."

Race on to fix Oroville Dam's damaged emergency spillway

Workers are expected on Monday to begin repairing erosion at the emergency spillway at Lake Oroville that threatened to flood downstream towns and forced more than 100,000 people from their homes Sunday.

Officials said they would use bags of rocks to try to plug the hole at the emergency spillway.

It appeared prep work was beginning Monday morning.

They emphasized the situation remains dangerous at the reservoir and urged residents in communities along the Feather River to evacuate to higher ground.

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