Fires burning in Victoria and South Australia today have resulted in large amounts of smoke drifting across the state.

Victorian firefighters have been working tirelessly over the past 24 hours due to extreme weather which resulted in a Total Fire Ban Day state wide.

Between 5 pm on Friday 5 January and 5 pm 6 January CFA crews attended over 139 fires, of which 114 were grass and scrub fires, and included four local crews attending a small fire near Pink Lake, north west of Dimboola, this afternoon.

The increased fire activity has generated large amounts of smoke in many areas of the state, along with a significant amount which is drifting into the Mallee, Wimmera and Northern Country from the bushfire in South Australia.

The late wind change has contributed to pushing smoke from the fires further east across the state.

CFA is urging all Victorians to take care as smoke can reduce air quality and may affect people's health.