Two teenagers got into difficulty in waters in Wirral, sparking a rescue operation.
The alert was sounded at about 5.30pm on Saturday when reports were made of two girls struggling in the water near Leasowe Lighthouse.
Wirral Coastguard Rescue Team and New Brighton Lifeboat were mobilised to the incident at Leasowe Bay and arrived at the scene.
But the girls had just managed to get themselves out and didn't need to be rescued.
A Liverpool Coastguard spokesman said it appeared the teenagers had gone into the water of their own accord because they were later given safety advice about swimming in open water.
No medical treatment was needed or a trip to hospital.
At the end of July, police and fire bosses issued urgent advice to people about swimming in canals, docks and open water following the tragic death of a teenager in Vauxhall.
Chief Inspector Phil Mullally, of Merseyside Police, said: “We know how tempting it can seem, particularly on a hot or humid day, to go swimming in canals or docks, but we want to remind people of the potential dangers and urge them to stay safe around water."
Enter your postcode below for updates near where you live
For the latest news and breaking news visit http://www.liverpoolecho.co.uk/news/.
Get all the big headlines, pictures, analysis, opinion and video on the stories that matter to you.
Follow us on Twitter @LivECHONews – the official Liverpool ECHO Twitter account – real news in real time.
We're also on Facebook/theliverpoolecho – your must-see news, features, videos and pictures throughout the day from the Liverpool ECHO.