Residents have been urged to use water sparingly as the persistent heatwave called the El Niño phenomenon drives up water demand across Gauteng municipalities.

According to the Department of Water and Sanitation (DWS), the heatwave will continue to place additional pressure on water supply systems during the 2026/27 summer season.

The department warns that excessive water use in areas with a reliable supply could worsen shortages in areas already experiencing water supply disruptions.

“This is compounding existing challenges, particularly substantial water losses through leaking municipal distribution infrastructure and high average consumption per capita in certain areas,” the department said.

In Midvaal, Municipal Manager Phumudzo Magodi informed residents about the implementation of restrictions by Rand Water, citing that current water consumption in Gauteng is well above the available design capacity of the bulk water supply infrastructure, placing a serious strain on the system and affecting Rand Water’s storage levels.

“To mitigate the situation and protect the regional water supply system, Rand Water has implemented a 25% restriction on municipal bulk water supply meters. This sudden, drastic reduction of water supply by Rand Water has negatively impacted the Municipality’s ability to supply water sustainably,” Magodi said.

The municipality said water supply will continue even though residents are experiencing reduced water pressure, particularly during peak consumption periods.

“Certain areas, including Klipwater and Henley on Klip, are already experiencing low water pressure and intermittent water supply interruptions. Residents are requested to report instances of no water or prolonged supply interruptions through the Municipality’s official reporting channels to enable appropriate intervention measures.

The municipality urged residents, businesses, industries, and institutions to use water responsibly and implement water-saving measures wherever possible.

“Reducing non-essential water consumption is critical to easing pressure on the system and ensuring the continued availability of water for all consumers. The Municipality will continue to monitor the situation closely in collaboration with Rand Water and other relevant stakeholders and will provide updates as further information becomes available.”

Municipalities have been encouraged to keep communities regularly informed about the status of their water supply systems, including treatment and distribution capacity, supply constraints and interventions that could affect availability.

The department said consistent and timely communication will help residents understand prevailing conditions, plan accordingly and make informed decisions about their water use.

“Where necessary, DWS will implement reductions in authorised water abstraction by agricultural, industrial and other water users, including water boards, to protect stressed water resources.”