As an action, you either create or purify water.
Create Water. You create up to 40 liters of clean water within 5 meters in an open container. Alternatively, the water falls as rain in a sphere twice as big as normal within 10 meters. Any burning creature in the area stops burning and exposed flames in the area are doused.
Purify Water. All nonmagical liquid within a sphere within 5 meters is purified and rendered free of poison and disease.