Emergency warning for Vic grassfire

An out-of-control grassfire could affect towns around the Trawalla area in central Victoria, fire authorities say.

An emergency warning has been issued for Brewster, Chepstowe, Mount Emu and Mena Park.

These areas could be impacted any time within the next two hours, the CFA said at 1600 AEDT on Monday.

It says a fast-moving, out-of-control grassfire is travelling in a south-westerly direction from Trawalla East Road towards Carngham-Streatham Roads/Morchup-Mount Emu Roads between the Trawalla West Road, North and South Road and Kayleys Lane.

Spot fires and ember attacks are starting up to 500 metres ahead of the main fire.

The grassfire is burning near Trawalla, about 40km west of Ballarat.

A CFA spokeswoman said the fire was in bushland, in a blue gum plantation, and covered about 300 hectares.

Residents in affected areas have been told their safest option is to leave now.

"These areas could be impacted any time within the next two hours," she said.