For the Grunewaldturm, Radfahrerwiese and Breitehorn areas, however, the health warning remains in place due to the growth of algae. The Lageso also continues to advise against swimming in the Dahme in the areas of Schmöckwitz, Große Krampe and Bammelecke. In general, the state office warned against swimming in murky waters. Children in particular should avoid areas with green and blue-green streaks. Sensitive people could experience skin irritation and allergic reactions. The algae also make rescue operations more difficult due to their low visibility.