After three surfers died in a rip current in Cornwall, the Royal National Lifeboat Institution has advice on what to do if you encounter one.
You can spot a rip current by looking for a rippled patch of sea amid otherwise calm water. There might also be foam on the waterâ€™s surface, debris floating out to sea or discoloured, brown water caused by sand being stirred up from the seabed.
â€œRip currents sound complicated but they are essentially fast flowing bodies of water that can drag people and debris away from the shoreline,â€ said Greg Spray, RNLI lifeguard manager for Newquay and Padstow.
â€œRips can be very difficult to spot, but sometimes can be identified by a channel of churning, choppy water or debris on the seaâ€™s surface. They can also form around permanent structures in the sea, like piers or sea walls. So please bear this in mind if you find yourself swimming close to these.â€
See Telegraph Travel