Residents were told to leave their homes and belongings at 4.30pm PST (12.30am GMT) on Tuesday February 12.
Officials warned that a 30 foot wall of water could come crashing down on Oroville and the surrounding areas if the spillway burst.
More than 36 hours later residents the evacuation notice remains in place with no timeline for when people will be allowed back into their homes.
Oroville has become a ghost town, while footage shared on Twitter shows flooding in a park along Feather River, downstream from the Dam.
Water is no longer flowing through the damaged spillway, but the situation remains “unpredictable”.
Heavy rainfall has been forecast for later this week, which could increase water levels once again.
To prevent disaster, workers are routing water out of the Dam’s main spillway – which is also damaged – at a rate of 100,000 cubic feet per second.
Footage shows the incredible speed at which the water is crashing out of the reservoir.
Oroville Dam Crisis: Devastating images as 200,000 evacuated Mon, February 13, 2017
Mass evacuation orders were issued after a hole emerged in the main spillway of America’s tallest dam at Lake Oroville.
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65,000 cfs of water flows through a damaged spillway on the Oroville Dam in Oroville, California
Helicopters have dropped bags of boulders to strengthen the eroded areas and trucks have created a slurry to cement the repairs.
Chris Orrock, spokesman for the Department of Water Resources, explained the two-part approach to repairs.
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"You're putting rocks in a hole. Then you're putting slurry in to solidify it. When water comes down, it will hit that patch and roll off,” he said.
Parts of the county have been flooded
Oroville is almost completely empty
- Evacuation order given after Oroville dam expected to fail
- Californians evacuated as Lake Oroville dam threatens to burst
- Workers fill giant sacks with rocks near Oroville Dam
Acting California Department of Water Resources director Bill Croyle has stressed that the integrity of the dam is not impacted.
Earlier today, Butte County sheriff Kory Honea said at a press conference: “When it is safe, based upon the evaluations from DWR and our state and federal partners, then we’ll be in a better position as to when to lift the evacuation order.
“I recognise what hardship this has placed on our communities but we did this because our primary focus is to ensure public safety.
“The decision to allow people to return is an equally difficult decision to make and it is one that has to be based on analysis.”
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