Cape Town Dam Levels Under Pressure As Heatwave Pushes Water Use Higher

Cape Town’s water reserves are back under the microscope as soaring temperatures across the Western Cape push water consumption higher.

According to the latest update from the City of Cape Town’s Water and Sanitation Department, dams supplying the metro are currently 51.8% full. While the city is not facing an immediate crisis, officials warn that the coming months will require careful water management as the region waits for winter rainfall.

The current heatwave has triggered a noticeable rise in daily water demand across the metro, placing added pressure on the system.

Water Consumption Climbs During Heatwave

The City reports that daily water usage has climbed to 1 018 million litres per day, up from 1 012 million litres recorded last week.

That figure now sits 43 million litres above the city’s target of 975 million litres per day, which was set to help stretch available water supplies until the winter rain season arrives.

Zahid Badroodien, the City’s Mayco Member for Water and Sanitation, says reducing water consumption now is critical.

Officials have urged households, businesses and industries to focus on essential water use during the heatwave and avoid unnecessary consumption wherever possible.

Hot weather also affects water availability in another way. Higher temperatures increase evaporation from dams, which can accelerate the decline in storage levels.

No Drought Yet, But Caution Is Needed

City officials have stressed that Cape Town is not currently in a drought. However, the water system is entering what authorities describe as an early warning phase, where responsible use becomes increasingly important.

The remaining water in the dam system must last until the Western Cape’s winter rainfall season, which typically begins around May.

Projections from the City suggest that if rainfall follows normal seasonal patterns, dam storage could decline to around 40% by May before winter rains start replenishing supplies.

Dam Levels Lower Than Last Year

Another factor raising concern is how current levels compare with the same time last year.

The City says dam storage is about 17.5% lower than it was during the same period in 2025, highlighting the impact of weather conditions and increased demand.

The Cape Town water system relies on several major dams, including Berg River Dam, which forms part of the network supplying the metro’s growing population.

Officials say while the system remains stable for now, the months leading up to winter will be a critical period for water management.

City Urges Residents To Use Water Wisely

Authorities say the priority is to ensure that available water lasts until winter rainfall arrives.

Badroodien emphasised that while the city cannot predict how much rain the Western Cape will receive this winter, residents can still play a role in protecting the supply that remains.

The message from the City is clear. With dam levels already lower than last year and demand rising during the heatwave, careful water use now will help prevent tougher restrictions later in the year.

{Source:The South African}

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