Police say they are seriously concerned after several children were spotted swimming in the River Wear just a short distance from where two teenagers drowned.
Chloe Fowler and Tonibeth Purvis died almost two weeks ago.
Today, police issued another warning, urging people to stay away from open waters.
It comes as new figures reveal a surge in calls to emergency services for people in trouble in the water.
More top news
Emma brings you Sunday's forecast for the Tyne Tees region
The remaining two anti-fracking protestors who climbed a rig at a live well site in Kirby Misperton, North Yorkshire, have been removed.
The incident near Fenrother involved a Honda Civic travelling south from Scotland and a Seat Ibiza travelling north from Morpeth.