(Image: Yorkshire Water)
Yorkshire Water has issued a safety warning ahead of the Bank Holiday weekend.
The company is urging people to stay out of its reservoirs, which may appear inviting but can be extremely dangerous due to hidden hazards below the surface.
Reservoirs can pose risks including cold water shock, hidden currents, sudden drops, operational equipment and sinking mud.
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 not being 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."
Visitors are being reminded that water sports are not permitted unless organised through authorised clubs that operate at select reservoirs.
Mr Harvey also encouraged visitors to respect the environment and nearby wildlife.
He said: "Refraining from using disposable barbecues or starting fires, taking litter home, and keeping dogs on leads, especially around livestock, can all help to keep wildlife, the natural environment, and nearby farm animals safe."
Emergency services should be called on 999 if someone is seen in danger in the water.