Egypt has accused Ethiopia of violating international law after it received a notice saying that Ethiopia’s dam upstream on the Nile is now filling up with water for a second year. The hydroelectric dam has long been a source of tension in the region. Egypt, which relies almost entirely on the Nile for its water, sees it as a possible existential threat. Ethiopia says it is vital for its development. Decade-long negotiations over the dam have failed to reach a final agreement. Recent African Union efforts have stalled and now Egypt and Sudan, which also sits downstream of the Grand Ethiopian Renaissance Dam (Gerd), have asked the UN Security Council to discuss the issue. They want firm commitments over the timetable of the filling as well as the volume of water the Gerd will release.