It's unclear exactly what, if anything, was "turned on" in California, but the Department of Water Resources said no military entered the state.

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.

Trump's order is premised on the idea that increasing Delta pumping would make more water available for the rest of California. But experts say its more complicated than that.

There are growing questions about the effectiveness of a plan to address California's water crisis, weeks after the deadly wildfires.

A week after President Trump released over 2 billion gallons of California reservoir water — a move that largely befuddled experts — Assemblymember Diane Papan, D-San Mateo, decried the move

Chris Hayes explains how Trump's obsession with California's water supply, which led him to order the opening of dams, will do little to help L.A. fire victims.