Northwood residents will not be able to return home this weekend as police say the gas explosion investigation is days away from completion.
Some Northwood residents remain evacuated after the explosion yesterday. Photo: RNZ / Logan Church
Police Metro Commander Lane Todd said a scene examination is being carried out by police, Fire and Emergency and WorkSafe investigators.
Cordons around 12 of the evacuated properties remain in place and the police are patrolling the area.
People can be escorted to get medications abd supplies but the 12 properties are too unsafe to enter.
"While they are getting access in terms of their medications or any supplies they require we expect that security and cordons will remain in place over the weekend until the investigation with the teams is completed," Mr Todd said.
"We have had the gas company involved immediately after the incident and they've certainly been carrying out checks in the area."
An emergency centre in the Styx Mill Country Club will stay open to help residents in need until 4pm today.
Club chairman Bruce Mule said many residents are still yet to go into their homes for emergency supplies.
"We're asking everyone to go to that cordon. It's the only way you can get inside the area and to register your name and address there. They will soon be able to tell you whether you'll be able to go home or not.
"We've then got people at the Styx Mill Country Club at present who are unable to get into their houses and they've got concerns ranging from pets to animals plus medications and urgent clothes and paperwork they need and we're helping them on a case by case basis."
He said the Red Cross is also at the country club to help people and the Styx Mill Country Club Facebook page will be updating those impacted.
Strong response from community
The Christchurch community is being praised for rallying behind residents whose homes are uninhabitable after yesterday's gas explosion.
A number of people have opened up their homes to at least 20 people whose houses are affected by the cordon and are without power and gas.
Styx Mill Country Club manager Tom White said they have received boxes of free food to pass on. They have also had support from charities offering donations and even a cattery has offered to house the evacuees' pets.
Mr White said he has lived in the area for 14 years and to see everyone unite in support has been heartwarming.
Emergency services were called to the scene in Northwood at 10.16am, after the explosion in which six people suffered a range of injuries.
Three are now in a stable condition and one has been discharged, however, one person remains in a critical condition and another has been transferred to Middlemore Hospital in Auckland.
Last night Fire and Emergency said the fire had been extinguished, and power and gas had been turned off at the affected properties.
All residents in Northwood were asked to turn off their gas systems following the explosion. Electricity has also been shut off in the area.
Residents have described doors blowing open, objects falling off their walls, and debris landing on their roofs after a gas explosion yesterday.
Mina Marinkovic, who lives nearby, said she woke to the bang.
"Hearing and feeling a large shake and a crack and actually quite a lot of our lights fell down," Ms Marinkovic said.
"So of course we're like it can't be the lights, no way, so small and insignificant and then my friend who lives in Redwood asked me 'Did you hear that?' and of course I thought this is a lot greater than I thought it was and I look outside and see smoke escaping one of the houses."
The police say properties in Marble Court and Brookwater Avenue remain evacuated and cordons are in place.
WorkSafe, the police and Fire and Emergency are investigating the blast. A scene examination will be carried out today.
Area commander Dave Stackhouse said safety experts were still checking whether people could return to other houses behind a wider cordon.
Motorists are advised to follow diversions and avoid the area.
Marble Court, Brookwater Ave, Millstream Drive, Springbrook Lane, Brookfield Drive and Water Mill Boulevard are all closed.
Police said the cordons will remain until the site is safe, and the situation will continue to be reviewed over the coming hours.
The public is asked to avoid the area until police have completed their investigation.
Fire and Emergency said one property has been destroyed and five properties have been severely affected by fire.
The explosion also damaged nearby properties - with 17 hit by debris - and at least 50 surrounding properties evacuated. Roofing tiles and insulation material was scattered over neighbouring properties.
Canterbury metro police commander Lane Todd said safety experts have been going from house to house to ensure homes were safe for people to return to.
- Fire and Emergency services area commander Dave Stackhouse and Canterbury metro police commander Lane Todd provide an update
Mr Todd told Checkpoint that people were thankful it wasn't worse.
"Everyone's just thankful that no-one was killed in this incident and I'm sure if you've had a look around it is quite amazing that no-one was killed, although we have people seriously injured."
The scene of a gas explosion that destroyed a Christchurch property. Photo: RNZ / Logan Church
Mr Stackhouse said a team was looking into what may have caused the blast.
He said emergency services were working as quickly as they could so evacuated residents could re-enter their properties.
Tradie James Looyer, who helped dig the injured out of the rubble, told Checkpoint he was with his workmates at the time of the explosion.
"We pretty much just thought it was an earthquake ... just looked straight down the straight and you could see it, just a big burst of flames and smoke just sitting up in the air.
"Every house in the whole street, everything was rattling."
"There was this big, pretty much, a cloud was sitting above one of the houses and heaps of smoke pouring out of it."
"They were pretty deaf from the big bang" - Tradie James Looyer
He said the impact could be seen as far as 50m to 100m down the road with bricks off walls, garage doors caved in, guttering collapsed, window framings popped down from houses.
"There was rubble everywhere, all across the road."
He said he headed over in his van with his workmates to check it out.
"You could definitely smell a lot of gas through there ... it's definitely a gas leak by the sounds of it.
"Had a look over the fence and there was a whole house just collapsed into one big pile in the middle and there was five people inside."
The survivors who were trying to crawl free were stunned and deaf from the explosion, he said.
"They were all pretty much underneath the wood and ... [we] just hopped over the fence and started pulling all the wood off them and carried out as many as we could see and ... got a couple of the guys out of there and then found a few other people around the house and pulled them out.
"There was framework all over the top of them, half of them were trying to crawl out ... another lady was just laying down on the ground underneath of it. The two guys I work for just got straight in there - no hesitation - and just started pulling all the wood off them.
"Everyone was safe on the lawns but they couldn't really hear what we were saying, they were pretty deaf from the big bang.
"They were absolutely in shock... their eyes were bloodshot... they were scared laying there and asking for help pretty much."
He said it was "pretty much nothing left" of the house where the explosion happened.
"Apart from the framing in the middle ... all the bricks are just scattered around the outside of the place.
"The roof has just absolutely blown straight off ... scattered around the whole street.
"The next door neighbour's exactly the same, all the bricks have caved in, all the windows are gone, the garage windows are all caved in."
Resident says his shower disintegrated
David McCracken was one of 50 residents to evacuate - his house is less than 10m away from the property that exploded.
He told Checkpoint he initially thought the noise was coming from his house.
"I was in the shower at the time and the shower was disintegrating around me, I thought the boom - the explosion - was from our house and I went outside an it was pretty badly damaged but then I realised the fire started in the house behind.
"The tiles of the roof landed on my car, smashed the front windscreen, the car's all smashed. Our house, all the framing is blown out of the house and all the windows blown out, yeah, it's pretty bad."
Mr McCracken said he helped to evacuate his elderly neighbour and her dog before running towards the house to check on the residents directly affected.
"So the tiles of the roof landed on my car, smashed the front windowscreen, the car's all smashed, all the framing is blown out of the house .. the windows all blown, so yeah it's pretty bad.
"I'm just glad this morning that my wife and daughter weren't there."