My cat calls the police when she runs out of water.
Let me explain.
When Fern runs out of water, she will wander the house looking for any cup that was left out anywhere by the big smelly apes she allows to live with her. Then she promptly knocks it over. The sound of it hitting the ground triggers the glass break sensors, which sets off the alarm, which calls the police.
And they say you can't train a cat.