A significant fire has torn through an oil refinery in Corio, and is continuing to burn out of control throughout this morning.

There are concerns the Viva Refinery, which supplies 10 per cent of the nation’s fuel, will be out-of-action for “at least a couple of days”.

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Today Show reporter Christine Ahern says firefighters were confronted by a “wall of fire” when they arrived at the site.

Press PLAY below for the details on the huge blaze

She told 3AW Breakfast the impact on the refinery’s operations is expected to be “severe”.

A Watch and Act message for areas south of the refinery has been downgraded.

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