Cape Town: South Africa’s second most populous city will run out of water by the end of April.

“Day Zero.” That’s what Cape Town is calling April 21 — the day that taps in the port city are expected to run dry.

For three years, Cape Town has had below-average rainfall, but in recent months the drought has reached a critical point.

The city recommends that each person use 87 liters of water per day, and will lower that to 50 liters starting Feb. 1.

“We are told to limit our showers to one-and-a-half minutes,” says Christine Colvin, the senior manager of the World Wildlife Fund’s Freshwater Program in South Africa. “So I, for one, have had to cut my hair shorter because that wasn’t long enough to wash my hair.”

Residents have been strongly discouraged from taking baths, watering gardens and refilling swimming pools.

But the restrictions have divided people. Many have committed to lowering their water usage and are anxious at the prospect of Day Zero, Colvin says.

“And yet there’s pretty much half of our population who seem to be in denial about it and about the potential reality of [Day Zero].”

The city has plans to try and beat the clock, but drilling of aquifers has moved slowly and a proposed draught levy has caused controversy.

If water usage doesn’t drop significantly, residents could have to start lining up at government distribution centers to get their water rations by April 21.

To avoid becoming the first major city to run out of water, Colvin says “there are some very practical things that Capetonians need to start doing, sooner rather than later, to get ready for this really disruptive and difficult situation that we’re about to experience.”

Located on the shore of Table Bay, Cape Town is the oldest urban area in South Africa. It is the legislative capital of South Africa as it is the seat of the country’s parliament.

It is among the world’s most multicultural cities, a major destination for immigrants and expatriates to South Africa. In 2014, Cape Town was named the best place in the world to visit by both the American New York Times and the British Daily Telegraph.

It was first developed by the Dutch East India Company as a supply station for their ships sailing to East Africa, India, and the Far East.