I suggest we shop for rain barrels and water testing.
The Yanzee is at historic lows. The Colorado river has stopped flowing before the sea, India has little snow pack for their rivers. Germany has rivers so low shipping traffic is being limited. The Hoover dam water intakes are now above the historic low water levels.
The global effect is dire already.

If we don't hit our target to reduce warming we will lose the same amount of water as current annual usage by evaporation and other causes.

The future of global warming is now here ahead of time.
Avoid the shortage crises and take remedial action now.