As temperatures rise, it’s natural to look for ways to cool down. Lakes, reservoirs, rivers, canals and quarries can seem like the perfect place to escape the heat. But while open water may look inviting on a warm day, it can be far more dangerous than many people realise.
Recent reports of tragic incidents involving children, young people and adults across the UK serve as a heartbreaking reminder of the importance of water safety, particularly during periods of hot weather when more people are drawn to open water.
Why is open water so dangerous?
Unlike swimming pools, open water environments are unpredictable and largely uncontrolled.
Even on the hottest days, water temperatures can remain surprisingly cold. Entering cold water suddenly can cause what is known as cold water shock, triggering an involuntary gasp reflex, rapid breathing and panic. This can happen to strong swimmers as well, not just inexperienced ones.
Other hidden dangers include:
- Sudden drops in depth
- Strong currents and underwater hazards
- Mud, weeds and debris beneath the surface
- Slippery banks and uneven entry points
- Limited visibility underwater
- Difficulty judging distance and depth
What looks calm from the shore may be much more hazardous once you’re in the water.
Stay safe during heatwaves
During heatwaves, more people head outdoors to cool off. You may be tempted to swim in places that aren’t designated for swimming, often without fully understanding the risks.
The contrast between very hot air temperatures and much colder water can increase the likelihood of cold water shock. Excitement, peer pressure and a desire to cool down quickly can also lead people to enter the water suddenly without taking precautions.
It’s important to remember that water temperature does not rise as quickly as air temperature. Even when the weather feels tropical, lakes, reservoirs and rivers can still be cold enough to cause a dangerous physical reaction.
Water safety tips
If you’re planning a day out near water or talking to your children about staying safe, these simple steps can help reduce risk:
- Choose supervised locations
Whenever possible, swim at lifeguarded pools, beaches or designated open water swimming venues where safety measures are in place.
- Never jump straight into open water
Enter the water gradually, allowing your body time to adjust to the temperature.
- Stay together
Children should always be supervised around water. Older children and teenagers should avoid swimming alone and ensure someone knows where they are.
- Avoid alcohol and risky behaviour
Taking risks around water, showing off to friends or swimming after consuming alcohol can significantly increase danger.
- Know what to do in an emergency
If you find yourself struggling in water, remember: Float to Live.
- Tilt your head back with your ears submerged
- Relax and try to control your breathing
- Move your hands and feet gently to stay afloat
- Once breathing is under control, call for help or swim to safety if possible
If you see someone in difficulty, call 999 and ask for the Coastguard if at the coast, or Fire and Rescue Service if inland. Never enter the water yourself to attempt a rescue.
Building water confidence
Learning to swim is one of the most valuable life skills a person can develop. Swimming lessons help build confidence in and around water, develop vital survival skills and understand how to stay safe.
Just as importantly, having regular conversations about water safety can help children and young people make informed decisions when spending time with friends near rivers, lakes and reservoirs.
But it’s not just children at risk. Many adults also get into difficulty because they don’t understand the dangers. It’s just as important for adults to respect the water and lead by example.
Water can provide fun, exercise and relief from the heat, but it should always be approached with caution and respect.
By understanding the risks and making sensible choices, we can help ensure everyone returns home safely after a day by the water.

























































