Chinook salmon have been laying eggs in gravelly nests in the Sacramento River for millennia. But California’s biggest river is now so warm that biologists expect a significant number of the eggs won’t hatch. Environmental advocates blame the Trump administration. They say the federal government took too much water out of Shasta Lake for farms in the Central Valley, leaving the reservoir too warm for many salmon eggs to survive in a vital spawning area downstream from Shasta Dam. … State biologists who monitor salmon nests in the Sacramento River estimated on Sept. 4 that about 20% of the eggs may not survive. The river has gotten warmer since then.

Other salmon news:

• Active NorCal (Redding, Calif.): DWR finishes $2.37 million salmon spawning project on the Feather River just in time for fall
• Active NorCal (Redding, Calif.): Extra water is pouring down the Trinity to protect the Klamath’s first big post-dam salmon run​