A bushfire that has broken out in northern Victoriahas quickly climbed to the highest emergency warning level as it heads towards homes.

The out-of-control blaze broke out on the Goulburn Valley Highway in Trawool about 1pm.

The fire is moving in a south-westerly direction towards Fairview Road and the Tallarook State Forest.

Trawool fireThe out-of-control blaze broke out on the Goulburn Valley Highway in Trawool. (Nine)

Residents in large parts of Kerrisdale, Tallarook and Trawool have been urged that it is too late and to take shelter indoors immediately.

Those north of the Goulburn Valley Highway, in parts of Granite, Kerrisdale and Trawool are not under direct threat, but should stay informed.

“There is currently no threat to you, but you should stay informed and plan for what you will do if the situation changes,” the CFA said.

The potential fire impact zone has since been extended to Strath Creek, where residents along King Parrot Creek Road and surrounds from Tehans Road to Strath Creek Road have been told to evacuate immediately.

Residents in large parts of Kerrisdale, Tallarook and Trawool have been urged that it is too late and to take shelter indoors immediately. (VicEmergency)

Conditions around the fire are currently peaking at 32.5 degrees, with northerly wind gusts up to 45 km/h.

The mercury in Melbourne is slightly warmer, reaching 33.7 degrees at 2pm.

Authorities are bracing for a gusty south-westerly wind change expected to move from the far-south-west of the state in the coming hours.

That wind change should sweep across the fireground later tonight, which could pose further challenges for firefighters.

Trawool fireSeveral air assets have been deployed to smother the flames with water from above. (Nine)

A Total Fire Ban is in place across five fire districts today, amid extreme fire danger ratings.

Those districts include the South West, Wimmera, Central, North Central and West and South Gippsland. 

Several air assets have been deployed to smother the flames with water from above.

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