A MASSIVE blaze at a fireworks factory lit up the sky in Southampton, UK.

Footage shows explosive scenes of fireballs and the sound of bangs as dozens of fireworks stored inside went off.

Homes and properties within 100 metres of the southern Fireworks Factory were evacuated.

More than 70 firefighters and 13 engines and support vehicles helped bring the blaze under control.

Hampshire Fire and Rescue Service group commander Howard Watts said: “It was a challenging scene when we arrived — with all the explosions we couldn’t get too close to the fire,” according to the BBC.

“Our main concern making sure everyone in the area was safe and to make sure no-one was in the building.”

Resident Jill Sainsbury said she heard an “almighty bang” and saw different colours appear in the sky at around 5am.

Ryan Gregory, who lives nearby, said he initially thought the bangs were gunshots.

“I looked out of my window to see there was a lot of smoke. Immediately I knew it was from the Firework Factory, but I didn’t expect it to go up in the blaze that it did,” the BBC reports.