The fire is one of several currently burning across the state, and it is one of five active fires within the national park.
Emergency services said a “significant increase in fire activity overnight” had caused the fire to spread in multiple directions.
While the fire activity has temporarily subsided, authorities still expect the fire to impact private land on the western edge at various points between Hoffmans Road and Woohlpooer Road this morning.
The fire is currently heading north-west towards the Henty Highway, which remains closed from Cavendish to Horsham.
“Leaving immediately is the safest option, before conditions become too dangerous. Emergency services may not be able to help you if you decide to stay,” the alert said.
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It comes as multiple other blazes continue to burn with a watch and act alert issued for Brimpaen, Wartook and Zumsteins.
The fire is burning about 9km from Halls Gap.
A watch and act alert has been issued for Lawloit, Kinimakatka, Winiam, Gerang Gerung, Dimboola west of the Wimmera River, Duchembegarra and Nurcoung.
“This fire is still active and the situation can change at any time. You must monitor conditions and be ready to act,” the warning said.