Saudi Arabia faces significant water scarcity issues due to limited natural water sources like rivers and lakes as well as low rainfall. Most of its water comes from desalination plants and dams. If water usage continues to increase at the current rate, 70% of the population may lack access to safe drinking water by 2030. Australia has more abundant water sources but also experiences water issues in some inland, arid areas with low rainfall like Western Australia. Both countries emphasize sustainable water usage, collection, and conservation efforts to ensure long-term water security for their growing populations.