The deaths from heat are silent deaths, the connections are complex, Herrmann said. And he conceded: "The plans alone will not save any people. What is needed, he said, is for actors to take responsibility together. "It is no longer acceptable that we go into great danger unprepared." According to Bobbert, heat is a concrete danger for people with pre-existing conditions, pregnant women, young children and people working outdoors. For the elderly and pre-existing conditions, and especially for those of them who live alone, "heat waves are life-threatening."