Multiple outlets report that deaths linked to open water incidents rise during the UK heatwave as people swim or enter rivers, ponds and other waters in unusually hot conditions. Sky News says a teenage boy dies swimming in a pond, adding to a running count of open-water fatalities during the hot weather, and later reports a 15-year-old girl becomes the 13th person to die in a water-related incident. Evening Standard and Belfast Telegraph report further deaths, including a teenage boy counted among the 12th fatalities and, separately, a 19-year-old man counted among the 14th. The Mirror reports the total number of heatwave-related drowning deaths reaches 15 across the UK, citing victims including a 13-year-old boy and a 72-year-old woman. The i reports police step up water patrols after the fatalities, including mention of a 16-year-old boy who died after getting into difficulty in the water on Thursday. Across coverage, emergency services and police issue urgent warnings about the risks of entering open water during hot weather and the need for caution.