TOPSHOT - Aerial view taken on July 25, 2019 shows bathers on and around a pontoon floating on the Altwarmbuechener See lake in Hanover, northern Germany, where temperatures were predicted to reach 39 degrees Celsius. - A ferocious heatwave that has broken temperature records across Europe is set to hit its peak on Thursday, July 25, 2019, sparking concerns about public health and new misery for rail travellers whose holiday plans have been badly affected. (Photo by Christophe Gateau / dpa / AFP) / Germany OUT