California and Nevada Flooding (Jan 2017)

Continued heavy rainfall across California and Nevada has led to further river flooding, levee breaches, mudslides and rockfalls . At least 600 buildings are known to be affected, this number is expected to rise as the flooding continues in the coming days and as damage assessments are undertaken in the affected areas. Officials have confirmed at least 5 people have died from the storms. California . Local media estimate that around 500 homes have been inundated along the Russian River in and near Guerneville. Prior to the flooding, 3,600 residents were evacuated from low-lying areas of the town and nearby Monte Rio. The Mokelumne River breached a levee near Sacramento on Wednesday January 11. Local media reports indicate some properties have been inundated; there are no official reports of the number of buildings affected at this time. On Tuesday January 10, authorities opened the gates of the Sacramento Weir to direct water through the Sacramento and Yolo bypasses to alleviate potential flooding along the Sacramento River. Around 50 people were rescued from the rural town of Hollister, San Benito County, as floodwaters rose quickly overnight, inundating approximately 40 buildings. Mandatory evacuation orders have been issued for some neighborhoods in the town. Approximately 2,000 people in the city of Wilton, Sacramento County, were evacuated as officials feared the Consumnes River could breach levees that protect the town. In Sonoma County, social media reports indicate at least 30 homes have been flooded in Forestville and 20 homes in the town of Seaside. At least 27 buildings have been flooded in the Carmel Valley, Monterey County, after the Carmel River breached its bank. In Mammouth Lakes, Mono County, at least 20 homes have been inundated due to flash flooding . The National Weather Service confirmed that an EF-0 tornado touched down north of Sacramento on Wednesday January 11. Local media reports indicate that minor roof damage has affected around 50 properties and outbuildings. A number of mudslides and rock falls have damaged at least 20 buildings and destroyed at least 10 across northern California. Officials confirmed a further 7 homes were destroyed from mudslides near Guerneville. According to officials, avalanche, mudslides and rock fall danger is high across California and Nevada at this time. An emergency alert for voluntary evacuation was issued for Olympic Valley due to heightened risk of avalanches in the area. Nevada. Although the Truckee River did not inundate downtown Reno, Washoe County, local media reports indicate the river rose around 2 ft (0.6 m) above flood stage near Sparks Industrial Estate, Washoe County, inundating several businesses and properties. Approximately 400 homes were evacuated in Reno on Monday January 9 in anticipation of the flooding. In Lyon County, at least 30 structures have been inundated, with a further 400 buildings threatened with additional flooding in the coming days. On Saturday January 7, Governor Brian Sandoval declared a state of emergency for Nevada ahead of the severe weather. Current river conditions and forecast. Across California and Nevada there are currently 10 river gauges in flood stage, 1 at Major flood stage, 3 at Moderate flood stage and 6 at Minor flood stage. A further 20 river gauges are forecast to enter flood stage within the next 48 hours. The California and Nevada River Forecast Center (CNRFC) has issued a flood outlook for the area covering Bodega Bay to Eureka, California, where significant river flooding is occurring or is imminent within the outlook period. A coastal flood advisory has been issued for the San Francisco Bay area until Friday January 13, with a considerable risk to coastal properties and roadways.

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December / January 2016-2017


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