More than a dozen tornadoes have touched down in the American state Oklahoma, threatening the homes of six million people.
Twisters, hail and flash flooding have caused damage to houses and other buildings across a 400-mile area.
More than twelve sightings of tornadoes were reported in Oklahoma, Kansas, Texas and Missouri, the extremely bad weather meant that some schools had to cancelled lessons, especially in areas where the wind was over 80mph, BBC reported.
Some flights were cancelled at Will Rogers World Airport in Oklahoma City.
There were at least 30 preliminary reports of tornadoes in the central US on Tuesday, most of the twisters occurring in Kansas and Missouri, Eyewitness News reported.
Over the past five days there have been 130 tornado reports, according to the National Oceanic and Atmospheric Administration's Storm Prediction Center.