Kassams may not run on water or electric, but you sure need it to manufacture them. Of course the cut-off of water & electric, would also include diesel fuel and any fuels necessary for generating power. Thirsty terrorists won't be able to think very clearly. Vipe old girl, ever hear of a real state of siege? That's next. They'll be chewing on their AK's for nourishment.
U.S. warns governments, bankers Iran sanctions still in place (Reuters)
from the article: U.S. lauds Israeli restraint in face of Qassam rocket attacks