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Sacramento River
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- 1Sacramento River heat threatens one in five Chinook salmon eggs▼California biologists warn Sacramento River heat could kill 1 in 5 Chinook salmon eggs
California wildlife biologists are warning that elevated water temperatures in the Sacramento River could kill roughly one in five Chinook salmon eggs this season. Warm water reduces oxygen levels and raises mortality rates for developing eggs, threatening one of the state's most important salmon runs on a river central to the state's water system.