An . . . Yes he is.
“Overriding Disastrous California Policies. (a) The Secretary of Defense, the Attorney General, the Secretary of Homeland Security, the Secretary of Commerce, the Secretary of the Interior, and the Secretary of Agriculture shall expeditiously take all measures, consistent with all applicable authorities, to ensure adequate water resources in Southern California. Each shall report to me within 15 days on all authorities, including emergency authorities, available to ensure, require, maintain, or use infrastructure necessary to fight and prevent massive wildfires in Southern California”
This doesn’t authorize water the ACE released.