California is expected to fight an order from President Trump that would divert water to farmers in the south part of the state.
The order comes after the Department of the Interior reversed its decision late last year on scientific findings that extended endangered species protections to a variety of fish. Trump had ordered the review that led to the change.
"A major obstacle to providing water for the region's farmers has now been totally eliminated by the federal government," Trump said Wednesday.
The plan would allow large quantities of water to be diverted from the San Francisco Bay Delta to the Central Valley to irrigate thirsty farm land. Critics fear that the diversion of water could harm Chinook salmon and the delta smelt.
"California won't allow the Trump Administration to destroy and deplete our natural resources," California Attorney General Xavier Becerra said in a statement. "We're prepared to challenge the Trump Administration's harmful attack on our state's critical ecosystems and environment."