PARIS, June 3, 2016 (Xinhua) -- A police boat patrols on the Seine river in front of Louvre museum in Paris, France, June 3, 2016. Due to heavy rainfall across French cities, flood waters have reached alarming level, forcing thousands of people to quit their homes, and plunged Paris' vibrant venues and most visited sites into chaos. (Xinhua/Ye Pingfan)