The Bunyip State Park fire, burning 65km east of Melbourne, was sparked by lightning strikes on Friday and has destroyed more than 10,000 hectares.
"The risk of lightning redevelops in the late morning with the chance of some showers and thunderstorms," Bureau of Meteorology's senior forecaster Christie Johnson said. "The Bunyip fire is worse than one that burned in the same spot on Black Saturday, the Country Fire Authority assistant chief officer Trevor Owen said."Whilst it damaged some property it was a very narrow finger compared to what we're facing with this fire, because this fire has been growing," Mr Owen told a community meeting in Pakenham.