hyperbole /hī-pûr′bə-lē/
noun
A figure of speech in which exaggeration is used for emphasis or effect, as in I could sleep for a year or This book weighs a ton.
What? You aren’t hungry enough to eat your horse?
Journalists have to make up hyperbole to get you to read their article. In this case they didn’t make it up, It was named (potentially) the deadliest by USGS in many of their articles.