More than 410,000 hectares have burned across the state, destroying 770 structures, including 228 homes.
That makes the scale of this month's fires similar to the Black Saturday fires of 2009, which killed 173 people.
On Thursday, a coalition of volunteer and career firefighters gathered on the steps of Victorian parliament to call for an urgent inquiry into the ongoing fires.
"Firefighters on the front lines have been speaking out about the lack of safe appliances, equipment and basic resources," CFA Volunteers Group Inc president John Houston said.
According to the union, 792 CFA tankers are out of date, unsafe and should be off the road, including 230 tankers more than 31 years old.
"What we are seeing now is the enormous consequence of governments ignoring those warnings while firefighters are placed at unnecessary risk and communities pay the price," United Firefighters Union Secretary Peter Marshall said.
The group has been campaigning about the lack of investment and the dangers posed ahead of the summer bushfire season.
Country Fire Authority chief officer Jason Heffernan said on Wednesday that firefighters were blaming themselves for the losses in the community.
He added the fires were unstoppable once they flared under catastrophic conditions.
"The reality is there is nothing they could have done other than warn the community, get the community out of harm's way and fight fire where it was safe to do so," he said.
"In the majority of cases, it was just simply not safe to do so."
State Control Centre spokesman David Nugent told AAP that two significant fires in the state's north were expected to burn for weeks, although crews had made positive progress in containment.
The Longwood fire has burned about 136,000 hectares, while the Walwa fire has burned 100,000 hectares.
"Those fires are continuing to burn, although under the conditions the fire behaviour will be less active, which is great for us," he said.
Mr Nugent says 770 structures have been lost, with fears more have been destroyed.
"They're big numbers unfortunately and as we continue to assess that damage... the numbers tend to increase," he added.
Meteorologist Angus Hines said significant widespread rainfall, heavy winds and thunderstorms were forecast for Victoria's southeast during the next few days.
The key firegrounds of Walwa and Longwood are only expected to receive up to 10mm of rain.
The fires have hit an array of diverse ecosystems from grasslands in central Victoria to forests in the Otways and the Big Desert Wilderness Park in the state's far northwest.
A huge variety of wildlife, plants and ecosystems had been affected, with even typically resilient species showing signs of impact, Deakin University's Euan Ritchie said.
"Wildlife populations and habitats are still recovering from previous fires (so) to have another severe fire in close succession, that obviously puts really heavy strains (on them)," the professor of wildlife ecology and conservation said.
"If we keep seeing these events happening too frequently ... it will be death by 1000 cuts for some species."
The Victorian Farmers Federation estimates statewide livestock deaths at 16,500, mainly sheep, from the ongoing fires.
It's not yet known how many wild animals have been affected, with concern for a population of dingoes living in Big Desert, along with long-footed potoroos in the state's east.
It's not only animals on land that worry experts, but also those in water and air.
"One that's often missed in fires is that although they burn on land, heavy rainfall events following the fires can wash ash into waterways," Prof Ritchie said.
"That can impact native fish species, frogs and crayfish - many that are threatened species in Victoria."
Wildlife Victoria said last Friday was its emergency hotline was its busiest day on record, with 1135 calls for help.
Wildlife vets and support staff are deployed at the state's largest grey-headed flying fox colony in Yarra Bend this week, where heat stress is often fatal.
27°C