Why the Devastating Floods in Europe?

CBS wrote on July 16 that “the scale of the disaster is unlike anything the area has seen in living memory—the worst deluge recorded in the region in more than 200 years…” Newsmax added on July 21 that thousands are still missing who are most likely dead. But why do disasters like these happen? Is it because of man-made global warming, or is the real cause overlooked? And once the cause is identified, do people respond and react in the right way?