More water is set to be released from Nimbus Dam Thursday, and water flows will increase from 3,500 cubic feet per second to 15,000.

Farther downstream, park rangers are warning people to move to higher ground, ahead of the release and the next storm. They also closed access to several parks that are prone to flooding:

• American River Parkway Trail, between mile 0.5 and mile 2.5, then at mile 20.5
• All islands on the American River, between Hazel Avenue and Discovery Park
• North of Discovery Park, between the boat launch and Garden Highway
• Howe and Watt avenues access points

Vehicles and pedestrians are not allowed into parks when they are closed. Violators could be arrested, Sacramento County Chief Park Ranger Michael Doane said.

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