According to the Sub-Regional Emergency and Civil Protection Command of the Porto Metropolitan Area, the fire was brought under control by 19:57, with no injuries or damage reported.
Emergency teams remain mobilized on-site as mop-up operations continue, it was added.
The fire alert in Alfena was received at 15:02.
By 22:00, there were 100 personnel on the scene, supported by 32 vehicles, as noted on the National Emergency and Civil Protection Authority (ANEPC) website.
