The West Midlands Ambulance team has treated a total of 13 people, including 12 firefighters, at the scene of the recycling plant fire in Smethwick.
In total three people were taken to hospital after more than 50,000 tonnes of recycling material was set alight.
Briefings are expected to take place today on road closures surrounding the factory.
Liberal Democrat president Tim Farron has repeated calls for a ban on Chinese lanterns following the Smethwick fire.
The Cumbrian MP made calls for the lanterns to be banned in 2012, saying "these lanterns are a spectacular sight to enjoy but many don't realise the harm they can do".
I hope that Defra agree that after the Smethwick fire last night an urgent review of the into the use of sky lanterns is needed.
As we now have daylight, firefighting can be more assertive extinguishing remaining 10% of recycling material still alight #SmethwickFire
Firefighters are struggling to deal with a fire at a recycling plant in the Midlands which was started by a stray Chinese lantern.Read the full story ›
Vijith Randeniya, chief fire officer of West Midlands Fire and Rescue Service said a Chinese fire lantern which sparked the fire in Smethwick has caused £6 million worth of damage.
We have a situation where a fire has started here, £6 million-worth of loss, started by one of these lanterns and that was eminently preventable.
We don't want to be party poopers and we know they are used in a lot of celebrations.
Fire investigators have established a Chinese lantern - captured on CCTV falling on to the site - was to blame for the fire, which at its height was being tackled by more than 200 firefighters.
Vijith Randeniya, chief fire officer of West Midlands Fire and Rescue Service, said the brigade did not want to be "party poopers" but called for a debate on the use of lanterns for celebrations.
He said: "My forensics people have been here from the start and have reviewed CCTV and spoken to people and looked at the way the fire started and looking at the CCTV evidence, you can see a Chinese lantern floating gently, and then land and then eight minutes later you see the fire start."
West Midlands Fire Brigade has released an image of a firefighter battling the blaze in Smethwick, which is now two thirds under control.
Firefighters are still battling to bring the Smethwick blaze under control amid the devastation, with some standing on the remains of burnt recycled material to hose down the fire.
The Government has spent £25 000 on a report into sky lanterns which found they are a significant fire risk, may hamper search and rescue services, and could pose a danger to aeroplanes.
They also pose a risk to cattle that could be injured by them – yet the government has decided to do nothing. After the Smethwick fire, Ministers must look at this issue again.
West Midlands Fire Service said firefighters have reduced the blaze in Smethwick to a third its original size.
Our firefighters have now managed to get the #smethwickfire down to a third the size of what it was at its height. But still loads to do...