The problem arises as a result of flooding.

Water hit. The problem arises as a result of flooding. If the canvas is made on a fabric base, then after drying you will have to completely replace it, because spots will remain on its surface. A polyvinyl chloride film will not suffer from cold water, but hot liquid can lead to the appearance of ruptures on it. In any similar situation, you need to immediately drain the liquid and, after thoroughly drying the canvas, evaluate its damage.