More than 3,000 flights were canceled on Friday, and thousands more were delayed due to a winter storm in the southern United States, according to airlines and the flight tracking website FlightAware. Delta Airlines crews expect to return to normal operations on Saturday, the company stated in a release.

“Unforeseen severe winter conditions at Hartsfield-Jackson Atlanta International Airport (Georgia) caused the closure of all five runways for more than two hours on Friday morning,” the airline said. Delta canceled about 1,100 flights across its network on Friday due to the “freezing rain that fell throughout the day and early afternoon, leading to diversions.”

Additionally, a Delta Airlines aircraft had to abort its takeoff due to a motor issue, also at Atlanta Airport.

More than 200 passengers and crew members aboard a Boeing 757-300 bound for Minneapolis were evacuated via emergency slides, according to a statement from the airline reported by U.S. media. An investigation is underway.

Airports in Dallas Fort Worth (Texas) and Charlotte Douglas (North Carolina) were also affected by the severe weather, with over 1,200 flights canceled.

On Saturday afternoon, two trams collided in the tunnel leading to the Strasbourg train station in northeastern France, resulting in at least 20 injuries, according to the local prefecture. “The initial assessment indicates that 20 people are in a state of relative emergency,” said a spokesperson, noting that the circumstances of the accident had not yet been determined.

A security perimeter was established in front of the station, where several ambulances arrived, as reported by an AFP journalist.

A video taken by a witness and shared on social media shows a chaotic scene, with two heavily damaged trams in the tunnel near the station. One of the trams appears to have derailed due to the impact.

Since Strasbourg revamped its tram network in 1994, no major accidents had been reported until this incident.