Mildura could break its November temperature record as scorching conditions prompt a total fire ban for northern Victorian areas.
The north-west town is forecast to reach 45C on Saturday - its previous record for the month was 45.5 in 2012.
Swan Hill is forecast to hit 44C and Echuca is expecting 42.
But the heat wave will only impact the north of the state, with Melbourne tipped to reach 28.
The Country Fire Authority has declared bans for the Mallee, Wimmera and Northern Country regions.
Gusty winds are also forecast, particularly in the north-west, plus thunderstorms in the afternoon and evening.
"The Mallee District will reach an extreme fire danger rating for the first time this season due to the forecasted gusty winds and increased grassland curing in the area," CFA Acting Chief Officer Alen (Alen) Slijepcevic said.
"Northern Country and Wimmera will also experience elevated dangerous fire conditions, with a severe fire danger rating.
"As a result, we have declared a total fire ban across all three weather districts."
Cooler conditions are expected on Sunday, but another temperature spike is forecast for next Tuesday.
