The U.S. Bureau of Reclamation has cut water releases from 1,100 cubic feet per second down to 500 feet.
"That has exposed some of the fall run salmon nests or 'redds' as they're called, r-e-d-d."
Tom Ghoring is with the Sacramento Water Forum.
On Capital Public Radio's Insight with Beth Ruyak, Ghoring said early surveys show that reductions, prompted by the dry winter, have left 15 percent of salmon nests or "redds" out of water.
"We know that exposing them is harmful to them. An exposed redd doesn't necessarily kill the eggs buried in the redd, but some of the nearby redds that are still underwater may be harmed so much that they could die."
~Tom Ghoring, Sacramento Water Forum
Reclamation officials say reducing water flows into the American River will help conserve the water supply stored behind Folsom Dam.
Insight will have more about how the lack of rain is impacting the region, coming up at 9 a.m.
A movement around the U.S. encourages people to skip the shopping malls Friday and spend time in nature. Some national parks and state parks in California are waiving entry fees.
The latest U.S. Drought Monitor showed no change to drought conditions in California over the past week. But, the report does not include the storm that brought rain to valleys and snow to the Sierra Nevada this week.
Two million Sacramento-area water users conserved 27 percent in October, the same rate as September.
A California law, which was passed to respond to the drought- allows artificial turf on all residential property. But a Sacramento city councilman says the law should allow cities to restrict its use.
There is no change this week to the drought in California, despite the recent storms that have brought snow to the Sierra. Reservoir storage in California remains the second lowest on record.