Experts said it involves two water storage and delivery systems -- the federally managed Central Valley Project (or CVP) and the state-controlled State Water Project (or SWP), from which Kern County gets most of its water.

Citing the LA fires, Trump directed federal agencies to “immediately take actions to override” water operations and environmental rules.

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