The call came out shortly after 7 p.m. on Thursday night for a water emergency on Table Rock Lake near Branson, Missouri.
"It’s out on the lake. It’s flipped over, and there’s 30 people in the water,” a first responder said on dispatch audio.
The incident appears to have involved the 'Ride The Ducks' attraction, which takes tourists on a land and water tour in an amphibious vehicle that drives on land and floats on water.
Several patients have been transported to area hospitals and 13 people are dead.
Severe thunderstorms were in the area just before the emergency was reported. Some of those storms at wind speeds measured at almost 80 miles per hour.