aerial view of church and residential buildings in city koblenz, germany on flooded rhine river with flood protection wall.

aerial building climate change cityscape flood control flood protection flood global warming germany koblenz aerial view architecture barrier church city climate danger deluge district europe flood rhine flooded promenade flowing high high water high water level houses inundation level name neuendorf outdoor promenade protection protection wall reflection residential rhine rhineland-palatinate risk river safety steeple summer text town view wall warming water