In 2008 she swam at the 2008 European Aquatics Championships on the world record breaking 4×100 m freestyle team, which also won bronze in the World Championships the year before. With the same team she ended fourth in the 4×200 m freestyle relay. Individually she did not reach the semi-finals. The next month she competed in Manchester at the World SC Championships 2008 where she again broke two relay records in the 4×200 m freestyle with the same team as in Eindhoven. In the 4×100 m freestyle Hinkelien Schreuder replaced Ranomi Kromowidjojo who suffered from an elbow injury. She won her first individual medal, a silver medal, in the 200 m freestyle at the last day of the tournament. During the National Championships in June 2008, Heemskerk lowered three national records on the long course, 200 m freestyle, 200 m individual medley and 100 m backstroke.