Dream about empty water tank is a portent for the aspect of yourself that is assertive, rational, aggressive and competitive. You are feeling emotionally restricted and unable to communicate how you feel especially in matters of the heart. You are still hanging to some part of your past and are not completely ready to move forward. Your dream is a symbol for your reckless habits. You want to be rescued from a current situation that you feel is beyond your control.
Empty water tank dream is a warning for a level of attraction between you and your friend, but you are too afraid to act on it. You have bitten off more than you chew. There is a negative influence in your life. This signifies minor irritations and annoyances. Some issue or some aspect of your life still remains unresolved.
If you dreamt about empty water tank:
It seems like the basis of your social ambition has taken a bit of a beating lately. They may be of a more modest nature, but that doesn't mean they won't be important. What motivates you professionally is going to be healthier and less egotistical. It will ultimately be a positive, satisfying evolution.