What are the top 10 worst hurricanes in U.S. history? Listing the worst hurricanes can take different variables, such as the deadliest or costliest. Here's a list in order of lives lost in the U.S ...

1889: The Johnstown Flood The deadliest flood in the nation's history was caused by a dam break upstream from Johnstown, Pennsylvania, according to the National Oceanic and Atmospheric ...