California dam threatens towns below

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A damaged spillway with eroded hillside is seen in an aerial photo taken over the Oroville Dam in Oroville, California. Credit: Reuters

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Water is released from the Lake Oroville Dam after an evacuation was ordered for communities downstream from the dam in Oroville, California, U.S., February 14, 2017. Credit: Reuters

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A cemetery is flooded in Marysville, California, after an evacuation was ordered for communities downstream from the dam in Oroville, California, U.S., February 14, 2017. Credit: Reuters

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Staff with the California Department of Water Resources watch as water is released from the Lake Oroville Dam after an evacuation was ordered for communities downstream from the dam in Oroville, California. Credit: Reuters

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Water is released from the Lake Oroville Dam after an evacuation was ordered for communities downstream from the dam in Oroville, California. Credit: Reuters

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