strömen
to stream
To move continuously in large amounts in one direction, like a liquid or gas.
Das Wasser strömte aus dem gebrochenen Damm.
The water streamed out of the broken dam.

to stream / pour
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to stream
To move continuously in large amounts in one direction, like a liquid or gas.
Das Wasser strömte aus dem gebrochenen Damm.
The water streamed out of the broken dam.

The verb 'strömen' (to stream/pour) is the root of the noun 'der Strom' (current/stream). All meanings of 'strömen' describe a movement that is reminiscent of a flowing stream, whether water, a crowd of people, or rain.
Ein starker Strom zog das Boot mit sich.
A strong current carried the boat along.
Since 'strömen' describes movement from one place to another, the perfect tense is always formed with the auxiliary verb 'sein'. This applies to all meanings of the verb.
Tausende Fans sind nach dem Konzert aus dem Stadion geströmt.
Thousands of fans streamed out of the stadium after the concert.
The direction of movement is often indicated with prepositions. Common combinations are 'strömen aus (+ dative)' (to stream out of), 'strömen in (+ accusative)' (to stream into), and 'strömen zu (+ dative)' (to stream toward/to).
Die Pendler strömen morgens in die Stadt.
The commuters stream into the city in the morning.
When 'strömen' means heavy rain, it is almost always used impersonally with 'es' as the subject. The expression is then 'es strömt' (it's pouring).
Nimm einen Schirm mit, es strömt draußen!
Take an umbrella with you, it's pouring outside!
to pull / move
'ziehen' and 'strömen' can both describe the movement of many things or people in one direction. 'ziehen' works well for groups that are moving together, especially animals such as birds. 'strömen' emphasizes the large amount and the continuous movement, almost like water. For example, you can say that people 'strömen' out of a stadium. The words can be confused because both show movement in one direction. However, 'strömen' sounds stronger and is more suited to large masses or liquids.

Nach dem Konzert strömen die Besucher zur U-Bahn.
After the concert, the visitors stream toward the subway.
Die Vögel ziehen im Frühling wieder nach Norden.
The birds migrate north again in spring.