How is Trump allowed to decide how we use our water?

His ordering of the opening of dams is distressing being that we are constantly fighting drought. Of allllllll the things he has done, this bothers me the most. It really seems he is trying to harm California.

Please don’t mistake this bothering me for being even close to ok with anything he is doing. I just feel like we have more control over the other things - the weather and rain we do not.

Is there nothing anyone can do?