An "explosion" was heard as fire crews rushed to tackle a blaze in a Liverpool home.
Merseyside Fire and Rescue Service rushed to Arncliffe Road in Halewood to reports of a house on fire at 1.49pm.
Once the fire service arrived at 1.56pm, the roof of a house was already well alight.
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Four fire engines were in attendance and more than 20 fire fighters used breathing apparatus and hose reel jets to extinguish the fire.
A combined platform ladder is being used to fight the fire from above.
One eyewitness who lives in a flat nearby, and asked not to be named, said there was a "massive flash and bang" before seeing smoke pouring out of the house.
She told The ECHO: "Basically I was sitting in the flat, on the fourth floor just over the road, and thunder and lightning was going on then next minute there was a massive flash and bang.
"I said 'what the hell is that?'. I knew it wasn't normal lightning because it was like an explosion. It was an explosive bang. I thought it was an explosion.
"Then we seen through the window the smoke pouring out of the house.
"I can see the damage from binoculars, it's all on the roof. It looks like the lightning stuck the roof and went down through the house.
"I though it might even be a gas explosion at first because the bang was terrible. I just thought I hope everyone is ok."
Merseyside Fire and Rescue service has since confirmed all occupants of the property have been accounted for.
A spokesperson from the service said: "Crews were alerted at 1.49pm and on scene at 1.56pm. Four fire engines are currently in attendance as well as the combined platform ladder.
"Two people were assessed at the scene by paramedics but didn't require any further treatment.
"A structural engineer has been requested to attend the incident."
While firefighters tackled the blaze, Arncliffe Road was closed in both directions from Camborne Avenue to Sherborne Avenue.
AA Traffic sensors said traffic was 'coping well'.
Firefighters carried out temperature checks in the affected home and neighbouring properties to make sure there is 'no further risk of fire spread'.
The fire service has now left the scene.
The eye witness added that she knew the fire was bad even before seeing the emergency services arrive at the scene.
She said: "The smoke was terrible, I'm just glad that nobody was hurt because people can get injured in these types of incidents."
