Workers are rushing to repair the barrier at the nation’s tallest dam after authorities on Sunday ordered… . A building is submerged from the overflowing Feather River downstream from a damaged dam at Riverbend Park on Tuesday, Feb. 14, 2017, in Oroville, Calif.

Workers are rushing to repair the barrier at the nation’s tallest dam after authorities on Sunday ordered… . A building is submerged from the overflowing Feather River downstream from a damaged dam at Riverbend Park on Tuesday, Feb. 14, 2017, in Oroville, Calif.

Workers are rushing to repair the barrier at the nation’s tallest dam after authorities on Sunday ordered… . A building is submerged from the overflowing Feather River downstream from a damaged dam at Riverbend Park on Tuesday, Feb. 14, 2017, in Oroville, Calif.