Two missing children were found safe and well after they went mising at Whitmore Bay on Monday afternoon.
A nine year-old sparked a major search operation after they were last spotted in the water.
The Coastguard helicopter from St Athan was deployed along with police, coastguards and local lifeguards using their rescue water craft.
The child was eventually found by RNLI lifeguards and police.
Later, a search for a missing seven year-old spotted at the water's edge in Whitmore Bay ended quickly when they were reunited with their parents.
The RNLI at Barry Dock said its D-class inshore lifeboat was called out to both incidents.
A spokesperson said: "With thousands of visitors on Barry Island and Whitmore Bay during this warm weather in the school holidays, it is easy to loose someone in the crowds. Please keep a watchful eye. Strong tides and currents in the Bristol Channel can quickly pull someone out to sea."
"In an emergency call 999 and ask for the Coastguard."

Former Holm View Leisure Centre could become education and community hub
ScoutsCymru members represent Wales at Royal Albert Hall Festival of Remembrance
Plans for indoor market at former Barry Wilko move forward
Police given additional powers to deal with anti-social behaviour in Barry
Senedd passes supplementary budget with £60m boost for additional learning needs
Future of planned festive events in question after criminal damage to Barry Town Hall
Consultation to open on plans for 35MW solar farm near Penarth
No Trains through the Vale of Glamorgan this Sunday
Police and Cardiff City launch operation to tackle matchday anti-social behaviour
Free leaf and fallen fruit collections return in the Vale
Barry retains Fairtrade Town status until 2029
£1m improvements planned for Pencoedtre Park as splashpad work set to begin
Plan submitted for new independent school on site of well-known charity farm
Is your hot water bottle safe?
Solicitor sentenced for defrauding Cancer Research UK
Cate is crowned champion!
WATCH: Winner of The Voice UK Cate McHugh duets with Sir Tom Jones
Barry filmmaker takes her documentary to the big screen in New York
Pupils leave their mark on new school at steel signing event
£3m refurbishment plans revealed for Cowbridge Town Hall