Grass pollen levels will remain moderate this afternoon and tomorrow due to the continued dry, warm weather.
By Saturday it will reduce as heavy, thundery downpours are expected and temperatures will drop back to the low 20's.
More top news
Police would like to to speak to Steve Baxter in connection with the murder of Simon Clark from Pendine, Carmarthenshire, last September.
Mark Dot Perkins, from Cardiff, won 2 silver in rowing and a bronze in driving. Steve Sebburn, from Brecon, won gold and bronze in cycling.
Shortly before 5pm on Sunday, police were called to a two-vehicle collision involving a white Vauxhall Astra and a black Honda motorcycle.