Water choices

We are currently in drought in varying degrees around Australia. Globally we are being warned of the dangers of a pandemic. It would be incredibly fraught if these challenges were to happen at the same time. If it takes 20 seconds to thoroughly wash your hands and if that represents x litres of water - where x is the actual amount (which I would include if I knew how to calculate x) - would we have enough water to survive the pandemic? Hmmm.