Okay kiddo, so you know how we need water to drink and do things like take a bath or brush our teeth? Well, the grown-ups in Cape Town, a city in South Africa, are having a problem with not having enough water.
You see, there hasn't been enough rain lately, which means there isn't enough water in the dams (big lakes) where they usually get their water from. And the people are using too much water, like taking really long showers and leaving the water running when they brush their teeth, so they're running out of water faster than they thought they would.
The grown-ups are worried that if they don't start saving water and using less, they will run out completely and then they won't be able to drink or wash themselves. So they're asking everyone to be really careful with how they use water and not waste any. They have rules about how much water everyone can use and they're even making plans to bring in more water from other places.
It's a serious problem, but if everyone works together to save water, they can make sure they have enough for a long time to come.