RAMALLAH, Palestine /ISTANBUL The Palestinian Water Authority PWA) warned Saturday about the imminent humanitarian catastrophe in the Gaza Strip because of the collapse of water and sanitation services amid Israel's offensive. It said the enclave has become a region "dying of thirst." The PWA accused Israel of “committing a grave and systematic war crime by using thirst and starvation as tools of genocide.” It said that “water extraction in Gaza has declined by 70–80% since the beginning of the