Welsh Water issues warning ahead of heatwave in Wales

Welsh Water is expecting a sharp rise in usage this week, with parts of Wales forecast to reach 37°C on Thursday.

The company supplies around 850 million litres of water daily to three million customers, but during extreme heat, demand is expected to exceed 950 million litres.

Marc Davies, director of water services at Welsh Water, said: "Now that the red heat alert has been declared, we’re asking our customers to take extra care and stay healthy and safe.

"Please drink enough water to stay hydrated and cool – this is especially important for children, the vulnerable, and the elderly.

"Our teams are working around the clock to make sure we can keep up with the increased demand for water during this period.

"We are also out across our operating area working to fix leaks on our networks."

The company is urging people to stay hydrated and look after those at higher risk during the hot weather, including young children, elderly people, pregnant women, and those with long-term health conditions.

Welsh Water has also asked customers to avoid wasting water to ensure supply remains steady for everyone.

People are advised to reuse water where possible—such as using paddling pool water for plants—and to use watering cans instead of hosepipes.

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Fixing leaking taps and toilets, taking short showers instead of baths, and only using dishwashers and washing machines with full loads are other recommended measures.

The water provider is reminding the public that swimming or paddling in reservoirs is not allowed and can be extremely dangerous.

Although reservoirs may appear inviting, they are operational sites with hazards such as cold water shock, strong currents, sudden depth changes, and underwater machinery.

Even strong swimmers are at risk, and the remote location of many reservoirs can delay rescue efforts.

Welsh Water rangers regularly patrol sites to discourage entry into the water, with extra patrols during school holidays and heatwaves.

Mr Davies said: "We do also ask our customers to be mindful not to waste water during this period of warm weather, to help ensure that we have plenty of water available to all our customers.

"And while our reservoirs can look inviting, there are often hidden dangers, so please do not swim at our reservoirs unless it is at an organised event, with appropriate lifeguard support."

Organised open water swimming is only allowed at approved Welsh Water visitor attractions and under lifeguard supervision.

Customers can visit the Dŵr Cymru Dry Weather Updates portal for up-to-date information on reservoir levels and water-saving advice.