Anyone who lived through California’s last big drought from 2012 to 2016 remembers the rules.

You couldn’t water your yard so much that the water ran off into the street or sidewalk. Or hose down a driveway. Hotels had to put up signs telling customers they could choose not to have sheets and towels washed every day. Ornamental fountains were prohibited unless they recycled water. Watering landscaping within 48 hours of rain was forbidden. Cities couldn’t water grass on street medians. And if you washed a car with a hose, it had to have a nozzle.