then this was pretty abnormal and like a 100 year flood thing.
If this was very heavy and very unusual and you have not had any problems before, then I would hold off and watch and see. Sometimes mother nature throws us a curve ball and we have to adjust and realize that this will not happen again for along time.
If you do not buy this, then consider the product by UGL that you paint on the cement walls and its water proof. If you do not like this, then tear off the dirt and back fill and re group.