People have been told to avoid the area surrounding Fforestfach Industrial Estate as emergency services tackle a large fire.
The police and fire service are currently in attendance.
Officers say there are road closures in place.
Firefighters have extinguished the blaze at a scrapyard at Fforestfach Industrial Estate. The fire involved over 4,000 tyres.
Over 70 firefighters are currently tackling the fire, which is now confirmed to be at a scrap yard.