One resident, believed to live in Washington County in Illinois, filmed as a giant tornado approached his house. At one point he has to stop filming in order to run to the basement.
This video was uploaded to YouTube and ITV News cannot independently confirm its veracity.
More top news
The helicopter, which the royal was not in at the time, avoided a potentially deadly mid-air crash.
The shots on a bus sparked a major security scare as weekend tourists in some of the world's most famous casinos were told to bunker down.
The Ukip leader confirmed he had "no prior warning" of Douglas Carswell's resignation from the party as he hit out at the "staunch Tory".