A tornado struck areas of the city of Dallas in Texas on Sunday night, causing widespread damage and cutting electricity to thousands of homes.
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.
As of 11:00 GMT on Monday, the state’s largest utility company, Oncor, was reporting that 67,000 customers were still affected by power losses in the Dallas area alone, with thousands more in Fort Worth and elsewhere.
The company urged people to stay away from downed power lines and said its crews were working to restore electricity, although the morning commute for many was expected to be severely disrupted. A number of gas leaks have been reported.
The local NBC station reported that the tornado may have covered an area of about 17 miles.
One Dallas resident, Tina Devlin, told the station: “I heard all the snapping of the trees and the wind blowing, and so I climbed into this bedroom closet, and just as I got in there, the roof blew off.”
Although no serious injuries are as yet reported, the Washington Post quoted the Dallas Office of Emergency Management as saying three people had been taken to hospital with non-life-threatening conditions while another six were hurt when a lorry overturned. Bengbenronews