Stout urged another 300,000 customers in the Okanagan and southeastern British Columbia., to conserve even though their natural gas comes from Alberta.
RCMP say the explosion happened at about 5:30 p.m. PT Tuesday and forced about 100 members of the nearby Lheidli T'enneh First Nation from their homes.
The explosion caused multiple homes to be evacuated in the area, but they've seen been allowed to return home.
The pipeline is part of the T-South system, stretching over 1,000 kilometres from Chetwynd, B.C., to the USA border, which is why it impacts gas distribution across the province and into Washington.
The agency will work closely with the Transportation Safety Board, which is responsible for investigating the incident, he said.
Police say residences within several kilometres were evacuated as a precaution, but the evacuation zone has now been reduced to residences within a one kilometre radius of the explosion site.
"About 70 per cent of customers could be impacted here", said Douglas Stout, vice-president of external relations with FortisBC.
A pipeline explosion has been confirmed to be the reason for a large fire outside of Prince George.
"We can advise the fire on the pipeline has been extinguished, the line has been isolated and fully depressurized, Barnes said".
Teegee said area Indigenous leaders met Wednesday with Enbridge officials but left the meeting with unanswered questions about pipeline infrastructure.
"As a result of the incident affecting the Enbridge pipeline that feeds our system we are anticipating decreased energy flow and potential loss of service", notes the utility provider in an alert issued early Wednesday morning.
He said the blast sounded like a huge rumbling train or low-flying jet passing over his roof.
They say the cause is still under investigation.
Currently Fortis has reserves still in the pipeline south of Prince George, in its liquefied natural gas storage tanks in the Lower Mainland and on Vancouver Island, and there is some gas flowing from Alberta through a pipeline in southern B.C., Stout said.
According to B.C.'s Ministry of Environment, the incident occured at a gas line that is operated by Enbridge.
There is still no word on what caused the explosion or if any injuries are involved.
"This is a unique situation, we rarely have horrific explosion as we've had north of Prince George", Horgan said.
There are reports of a massive fire in Prince George.
More information to come as this story develops.