Rescue teams in northern Germany are working to refloat a humpback whale stranded in shallow water in the Baltic Sea. Experts gathered Tuesday morning on the Timmendorfer Strand beach to find a way to pull the 10-meter-long (30-feet-long) mammal off the ground after the high tide around midnight was not sufficient for the animal to swim free under its own power, German news agency dpa reported. Earlier rescue efforts on Monday afternoon with police boats, inflatable boats and the help of firefighter drones guiding the rescue efforts were also unsuccessful.