After the Olympics Heemskerk returned to competition at the 2008 European Aquatics Championships where she qualified for the 2009 World Aquatics Championships in the 100 m and 200 m freestyle. The week afterwards she participated in the 2008 European Short Course Swimming Championships in Rijeka, Croatia. There she won a silver medal in the 200 m freestyle behind Federica Pellegrini. She also finished fifth in the 100 m medley. At the end of 2008 she became Amsterdam Sportswoman of the year