Cardiff Council has issued a safety warning to residents and visitors, urging people not to enter rivers or Cardiff Bay to cool off during periods of warm weather.
With temperatures rising across the city, the council is reminding the public that while open water may appear inviting, it can pose serious and potentially life-threatening dangers.
The warning highlights a number of risks associated with swimming in rivers and Cardiff Bay, including cold-water shock, hidden objects beneath the surface and strong currents.
Cold-water shock can occur even on warm days, causing an involuntary gasp response, breathing difficulties and panic, which can quickly lead to people getting into trouble in the water.
The council also warned that submerged debris and unseen hazards beneath the surface can cause serious injuries, while strong currents can make it difficult for even experienced swimmers to stay safe.
Instead of entering rivers or Cardiff Bay, people are being encouraged to use designated lifeguarded beaches and supervised swimming venues where safety measures are in place.
A Cardiff Council spokesperson said: “Cooling off in a river or taking a dip in Cardiff Bay might sound like a good idea in hot weather but cold-water shock, hidden objects beneath the surface, and strong currents mean entering these waters can be extremely dangerous. Please use a lifeguarded beach or venue instead.”
The advice comes as many people look for ways to stay cool during the warmer weather, with authorities urging everyone to prioritise safety when spending time outdoors.
Residents are encouraged to follow water safety guidance and choose supervised locations if they plan to swim during the summer months.
