The "duck boat" was carrying 31 people when it overturned on Table Rock Lake, a popular tourist attraction. Two adults were in critical condition, while the others were being treated for minor injuries, a Cox Medical Center spokesperson told CBS News.
At that office, meteorologists had clocked winds at 119 kilometres per hour, issuing a warning to the area at approximately 6:30 pm.
The duck boat - given that name for its ability to operate on land and in the water - is based off a military design used in World War II.
The Coast Guard will conduct an investigation, said Sgt. Jason Pace of the Missouri State Highway Patrol, which is assisting.
The owner of the tour company involved in the fatal duck boat accident said the vessel should've never been in the water because of the rough conditions brought on by a violent storm.
He said he believed the severe weather caused the boat to capsize.
"They are risky on land and on water". He also said that the life jackets were stored on the boat, but it wasn't immediately clear whether passengers were wearing them when the boat capsized. They're devastated about other sightseers being killed during the storm while they made it back safely.
"The captain told us, 'Don't worry about grabbing the life jackets, you won't need them, ' so nobody grabbed them because we listened to the captain and he told us to stay seated", Coleman said.
The National Transportation Safety Board was to send a team early Friday to investigate the incident, the agency said.
Pattison said the captain of the boat, who survived, had 16 years of experience. "There are still people in the water", Parson said.
Philadelphia: Two tourists died in 2010 when the duck boat they were riding in was struck by a tugboat in the Delaware River.
Stone County Sheriff Doug Rader said the divers ended their "challenging" search on Thursday night before resuming their efforts yesterday morning.
A "duck boat" is seen at Table Rock Lake in Branson, Missouri July 19, 2018 in this picture grab obtained from social media video. "These boats were not designed for recreational use, especially with large numbers of people and weather like this". Five college students were killed in 2015 in Seattle when a duck boat collided with a bus; the operation in Branson is separate from Seattle.
Thirteen people died in 1999 when a boat sank near Hot Springs, Arkansas. The fast-moving thunderstorm that sunk the doomed duck boat that was within eyesight of theirs changed all that.