Snow, ice and freezing temperatures hit parts of Europe on Tuesday, causing treacherous traffic conditions that left at least five people dead in France and forcing the cancellation of hundreds of flights from one of the continent’s busiest airports.Authorities in the Landes region of southwestern France reported three dead in accidents, and at least two more people were reportedly killed in the Île-de-France region around Paris, where authorities ordered trucks off the road as snowfall caused huge traffic jams on Monday.Paris awoke Tuesday to a blanket of snow on its famous rooftops and sites, and children whose schools couldn’t hold...