The Sacramento Bee reports state and federal wildlife officials have announced a plan to move hatchery-raised salmon by tanker trucks should the river and its tributaries prove inhospitable for the fish.
Officials fear the rivers could become too shallow and warm to sustain salmon trying to migrate on their own.
They're keeping an eye on conditions and will be ready to implement the plan next month, barring heavy rains.
Salmon from the Coleman National Fish Hatchery on Battle Creek, a tributary of the Sacramento River, are usually released in April and May.
The trucking plan is similar to one carried out in the drought of 1991-92.
Record summer heat has increased fire risk in California and the Western U.S. as drought conditions expand.
Statewide water conservation exceeded the mandatory goal in May and Sacramento reduced water use 40 percent.
In the fourth year of drought in California, sales and use of "safe and sane" fireworks are restricted in some areas, allowed in others.
A California Assembly committee will hear a bill Wednesday that would allow water districts to impose taxes on any business, industry or person who wastes water.
The drought can be blamed for a number of problems and the latest is a major decline in the duck population. A new survey shows lack of rain has led to poor habitats.