Hamburg’s fire brigade issued a “hazard” warning after a cloud possibly containing chemical components drifted towards the city center.
German authorities have advised residents to avoid the area, and asked them to shut down windows, doors, and ventilation.
This follows a fire at a Rothenburgsort storage facility that caused 140 people to be evacuated.
According to police, it’s impossible to determine how dangerous the situation might be.
Numerous emergency personnel, including firefighters and police officers, were on the scene. A thick cloud of smoke rose upwards.
No reports have been made of any casualties.
NDR, a local public broadcaster, reported that the fire started at 4.30am at an abandoned truck stop.
NDR Hamburg was told by a spokesperson for the fire brigade that the city’s centre had been “completely blacked-out” at the time the fire broke out.
Hamburg police issued a “hazard Information” warning to residents and advised them to “drive as far as they can around the affected area.”
Deutsche Bahn, the German national railway company, announced a Sunday morning closure of Hamburg-Buchen due to the fire.
According to the railway, trains between Hamburg und Berlin would be delayed for around 90 minutes due to diverting and delays.