A tornado struck areas of the city of Dallas in Texas on Sunday night, causing widespread damage and cutting electricity to thousands of homes.
Video footage showed the tornado touching down in the north of the city at about 21:00 local time (02:00 GMT), with winds of 70mph (113km/h).
No deaths or serious injuries have so far been confirmed.
Emergency services are checking for any victims amid fallen trees, torn roofs, downed power lines and damaged cars.
Meteorologists said the tornado had landed in the area of the Love Field airport, before moving north-east.
The National Weather Service in Fort Worth at the time warned of "a life-threatening situation" and that "complete destruction" was possible.