What does it all mean?

Lately, every time I enter the bathroom, this is what I see: vessels full, partially full, or overflowing with water. Hannah will find whatever she knows will hold this precious resource and she will fill and refill and transfer and transport until I come to cut her off. This common practice in our bathroom reminds me of the girl in the movie "Signs", who leaves glass after glass of water around the house. Later these glasses of water help to save her and her family from an alien invasion in her home.
Maybe Hannah knows something we don't...?