Yorkshire Water issues reservoir update ahead of 30C heatwave

Yorkshire Water has issued an update on its reservoir levels ahead of a Bank Holiday heatwave.

Temperatures are set to hit 30 degrees in Leeds over the coming days. The UK Health Security Agency has issued a yellow heat health warning for the city - and the rest of the county.

In an update, Yorkshire Water has moved to reassure residents about its reservoir stocks. It has confirmed they sit at 86.4%, much higher than the 66% they were at the same point in 2025.

River and groundwater levels, which are used to supply parts of north and east Yorkshire are also healthy. The improvement has been driven by cooler temperatures and more rainfall this year, which has seen water demand reduce – average demand in May is down by 80 million litres per day when compared with May 2025 - and a reduction in leakage.

Andy Shaw, head of water quality and production, said: “We're in a much better position with our water resources in 2026, with reservoir levels at 86.4%, much higher than the 66% they were at this time last year. Groundwater and river levels are also healthy in the region, which we rely on for water supplies for parts of the north and east of our region.

“Average water demand is also much lower than last year. So far in May, demand is approximately 80 million litres per day lower when compared with May 2025, due to lower leakage levels and the cooler, wetter weather.

"We're expecting warmer temperatures in the coming days and would advise all customers to use water wisely, as we urge them to do all year round.

“This includes small measures like using a watering can rather than a hose to water gardens, and if watering is required, to do it in the mornings or evenings to reduce evaporation during higher temperatures in the day."

With the weather improving, Yorkshire Water is also urging those planning to get out and about to reservoir sites this Bank Holiday weekend not to enter the water and to leave the environment as they found it so others can enjoy Yorkshire's outdoor spaces.

While reservoirs may appear calm and inviting during the warm weather, entering the water can be extremely dangerous. Risks include cold water shock, hidden current, sudden drops, submerged structures and operational equipment beneath the surface.

Several Yorkshire Water reservoirs have tenanted clubs who offer safe water sports such as sailing and windsurfing. Watersports of any kind are not authorised at any Yorkshire Water reservoir unless carried out through one of these clubs. A full list of reservoirs can be found at yorkshirewater.com/things-to-do/reservoirs where any authorised fishing or water sport clubs and organisations are listed.

Alastair Harvey, lead countryside and woodland advisor at Yorkshire Water, said: “Sadly, we’ve seen incidents this year in Yorkshire where people have lost their lives in reservoirs and other open water. We’d advise sticking to the walking routes on public footpaths and don’t be tempted to go for a dip in the shallows or walk on the exposed embankment and structures, as there can be risks of sinking mud.”

Refraining from using disposable barbecues or starting fires, taking litter home, and keeping dogs on leads, especially when around livestock, can all help to keep wildlife, the natural environment, and nearby farm animals safe. Disposable barbeques and fires are not permitted on any of Yorkshire Water’s sites, and some of its sites are covered by Public Space Protection Orders (PSPO’s), meaning people could face on the spot fines if they are found to be using one.

Yorkshire Water’s rangers will be on site across reservoirs over the weekend, to engage with visitors and encourage considerate behaviour. 

 Alastair added: “Following the Countryside Code and ensuring to take litter home, keep dogs on leads, park considerately, and be friendly to other visitors and our rangers will help to make trips to our reservoirs enjoyable for everyone over the weekend.” 

 If visitors do see someone in the water who requires help or a fire, call 999 and ask for the Fire Service immediately – crews are trained and equipped to deal with such incidents.