A total fire ban has been declared across Victoria for Tuesday, as authorities fear hot and windy conditions could trigger fires that are ''difficult or even impossible to control''.

Country Fire Authority deputy officer Stephen Walls said the total fire ban would minimise the potential of disaster.

''The fire services are doing their part to be prepared … and we need the community to help by taking care not do to anything that may cause fires.''

The ban on open-air fires comes after a house blaze triggered a fast-moving grass fire north-west of Melbourne on Monday.

Flames that engulfed the weatherboard house at St Andrews, south of Kinglake, quickly spread through paddocks.

Nine crews were deployed to fight the grass fire, which was contained within two hours.