The chemical processing plant is sending smoke right across the city so if you’ve been wondering what it is that that’s your answer.
The burning warehouse is at Peterboat Close, Greenwich, near the Blackwall Tunnel, and firefighters have been trying to control the blaze since the alarm was raised at 03:30 BST.
Air raid-style sirens could be heard in south-east London thoughout.
This has all made the traffic around the area terrible so keep that in mind if you are traveling and the Tunnel Avenue has been closed from Blackwall Ln to Morden Wharf Rd because of the fire. People have been advised to keep their windows and doors closed.
Fire fighters and crew are still at the scene of the fire whilst they try to work out how it happened.