Gaza is dependent on Israel's permission. Food aid is provided by the UN and other humanitarian organisations, they require Israel's permission to bring that aid into Gaza and not attack it (n.b. attempts since 2010 to deliver aid by boat, such as the MV Rachel Corrie, have been attacked in international waters and the aid never reached Gaza). Israel destroyed the power and water desalination plants, making Gaza dependent on their supply, which has since been used as a weapon.

https://www.ohchr.org/en/press-releases/2025/07/thirst-weapo... https://www.bbc.com/news/articles/c1w0l3q4zd0o