"Don't care whether what they say is true or false; all I know now is that the sea level is rising! If we don't stop it, all the islands will be submerged!" Julio announced, causing Charles' face to turn as grim as theirs in an instant.
It was the kind of thing you could easily test for, so the other party couldn't possibly be lying; it was absolutely true.
If the previous earthquakes and Sea Monster attacks were considered common crises for humanity, then the rising sea level was undoubtedly a great catastrophe that would exterminate the human race of Earth Sea!
The islands are the foundation of life for Earth Sea's people. If the islands were all flooded, the civilization of Earth Sea would be completely annihilated!