Tornadoes hit parts of Oklahoma, Nebraska and Texas on Wednesday, affect an area with 9 million residents in total in a day wheather forecasts predicted extreme conditions.
The US National Weather Service said the rural town of Roseland, Nebraska, was hit at 4:22pm local time on Wednesday.
Officials said there were no reported injuries or any damage to homes and buildings as of 5pm local time.
In southwestern Oklahoma, a tornado touched down in the Wednesday afternoon, according to weather service meteorologist Michael Scotten.
At the Will Rogers World Airport in Oklahoma City, passengers, visitors and employees were evacuated to a pedestrian tunnel for about half an hour as the storms moved through the area.
"We've had at least one confirmed tornado, for sure," Scotten said, adding no one was hurt or injured.
The students were kept in school buildings in the Chickasha district, which is in the path of the tornado.
Richard Thompson at the Storm Prediction Center in Norman, Oklahoma, said it's too early to predict number of locations that the storms would flare up, but they are expected to be far from one another.
A swath of the Great Plains is under a tornado watch until late Wednesday, including parts of North Texas, Oklahoma, Kansas and Nebraska.
"This is the first of potentially several days of a severe weather risk," Thompson said. "There could be some pretty heavy rain overnight and eventually flooding could be a concern."
Authorities and experts urged people to be aware of the situation and take necessary precautions as the risk of storms and tornadoes is possible until Saturday in southeastern US.