Original Text
Rushing like a copious watercourse [which flowed] towards the north-west it caused clouds and dew to ascend on every side.
Simple English
It rushed like a powerful river flowing northwest, causing clouds and dew to rise all around.
Rushing like a copious watercourse [which flowed] towards the north-west it caused clouds and dew to ascend on every side.
It rushed like a powerful river flowing northwest, causing clouds and dew to rise all around.