"In my 29 years of being a firefighter, I have never ever seen anything of this scale".
A witness says, "Oh my god" as she spots the trapped resident.
Eddie, 55, who lives on the 16th floor, said he ran out of his house with a wet towel wrapped around his head as smoke engulfed the flat.
The cause of the fire remains unknown at this stage, the Fire Brigade said. He was advised to put towels under the doors and he said they will come for him.
"He was just as surprised at how quickly the fire spread as anybody else".
"There was another woman screaming "my baby, my baby, I need to get out, I need to save my baby".
The exterior of the 1970s-built tower was modernised with cladding and replacement windows, while additional homes were added using vacant space in the building.
He said nobody would have been able to escape above the third floor of the building.
A blog post by the Grenfell Action Group form November 2016 said it would take a "catastrophic event" for the authorities to take notice of residents' concerns. "A lot of people said 'Help, help, help.' The fire brigade could only help downstairs".
The police have asked everyone to avoid the area and London Fire Brigade has evacuated about 30 flats near the scene over fears the tower will now collapse.
Les pays du Golfe maintiennent la pression sur le Qatar
Le secrétaire d'Etat américain, Rex Tillerson, a pour sa part appelé vendredi Ryad et ses alliés à alléger le blocus, qui 'a des conséquences humanitaires'.
Police told news.com.au that people remained trapped inside the building as many as seven hours after the fire started.
"There were no fire alarms", said Daffarn, who was warned by a neighbor to flee.
Resident Chloe Busby said she could "still see flames" at 08:00 BST.
"It was like something out of a disaster movie". "At this time I am sad to confirm that we now know that there have been fatalities".
No confirmation has yet been made on any deaths in the fire.
He said: "It's horrendous, the whole building is engulfed in flames".
Currently, there are 40 fire engines and 200 firefighters working on the scene.
According to her, she woke when her son noticed fire outside the window.
George Clarke, who presents the Channel 4 TV show Amazing Spaces, told Radio 5 Live: "I'm 100 metres away and I'm absolutely covered in ash".
Eyewitnesses said they have seen lights - thought to be mobile phones or torches - flashing at the top of the block of flats.
"It was a complete nightmare".
Stuart Crighton, London Ambulance Service assistant director of operations, said: "We have sent a number of resources to the scene including our hazardous area response team and over 20 ambulance crews".
- Just one week for Djokovic and Agassi
- Taylor Swift Celebrates Sales Landmarks by Offering Catalog for Streaming
- SHOWDOWN: Sessions battles top Democratic senator over Comey's testimony
- Nicola Sturgeon fails to convince voters on education and services
- Cory Booker Wants Jeff Sessions Removed As Attorney General
- 5 things we learned at Jeff Sessions' hearing
- Jeff Sessions Denies Discussing Election With Russians In Senate Testimony
- One word from Comey's testimony could determine whether Trump obstructed justice
- Wallace knows all eyes on him as rare black NASCAR driver
- Nah Son: Golden State Warriors Reportedly Skip White House Visit