The U.S. Army Corps of Engineers has released water from two reservoirs in the foothills of the southern Sierra Nevada to meet President Donald Trump’s recent directive to funnel more water to Southern California, but some officials there question whether it will actually prove helpful.

It comes after water shortages allegedly hampered firefighting efforts in Los Angeles—a claim that state officials deny.

President Trump’s order to release billions of gallons of water in California’s Central Valley last week — with the purported goal of dousing fires 100 miles away — is being slammed as both ineffective and wasteful by experts and California lawmakers.