It is still unsafe for residents to return to their bushfire-ravaged communities in western Victoria as firefighters continue to battle several blazes.

Homes have been lost in Pomonal, east of the Grampians National Park, but it is unclear how many, Premier Jacinta Allan said.

"We are still in the emergency response phase, this event is still ongoing," she told reporters at the State Control Centre on Wednesday.

"There are people who spent last night in a relief centre not knowing if they've got a home to go back to today, and our thoughts are with them."

The threat has eased in the Grampians National Park, but two watch and act warnings for separate fires remain in place for residents in areas to the park's north and east.

Almost all fires in Victoria on Tuesday were believed to be sparked by lightning strikes as storms lashed the state and winds between 120km/h and 157km/h downed trees and electrical infrastructure, state emergency commissioner Rick Nugent said.

The State Emergency Service has received 4600 calls for assistance between 9am on Tuesday and 11.30am Wednesday.

Country Fire Authority chief officer Jason Heffernan said the blaze near Pomonal and Bellfield, which has burned more than 2100 hectares, remains the main focus for crews.

"We do know there has been property loss, both homes and outbuildings," Heffernan said.

He said early indications were the number of homes lost to the fires was likely to be lower than 20 or 30.

"It is very hard to differentiate between what is a shed, an outbuilding (or) someone's home," he said.

Fire crews will asses the fireground on Wednesday morning for any loss of life and damage to properties.

"We don't have any reports of anyone missing," state response controller Garry Cook told ABC radio.

"They were horrific conditions yesterday, reports of flame heights of 30 metres moving through that area during the height of the fire.

"People got out, which is great, but unfortunately there has been some property losses."

Five country firefighters suffered minor burns from cinders after flames went over their truck at Pomonal on Tuesday night.

Another fire near Mount Stapylton, further north in the national park, is burning at watch and act level.

"They're still not contained but ... we don't expect those fires to spread today given the work that's been done overnight," Mr Cook said.

Relief centres have been set up at the Alexandra Oval Community Centre in Ararat and the Grampians Community Health in Stawell.

"The situation is still evolving," Premier Jacinta Allan wrote on X, formerly known as Twitter.

"Right now, crews are on the ground and in the air working as hard as they possibly can to defend homes, lives, and properties."

The threat from an uncontrolled bushfire at Newtown near Ballarat has reduced after residents were told to evacuate from a grassfire spread that into a forest.

Five schools and 27 early-learning centres are closed on Wednesday across southwest Victoria.

Victoria sweltered through three days of hot conditions before more than 20 fires broke out.

Dry lightning strikes mixed with wind gusts reaching 100km/h, fanned the out-of-control flames.

Temperatures dropped on Wednesday following a cool change but fire conditions were expected to persist.

Bushfires in western Victoria

• Some of the worst bushfire conditions since Black Summer in 2019-20 sparked fires on Tuesday
• Two emergency warnings issued for separate fires in the Grampians National Park and nearby communities in western Victoria
• The fires in the Grampians are not yet contained but emergency services do not expect them to spread on Wednesday
• Flame heights of up to 30m were witnessed by emergency services
• It is unclear how many homes have been lost to the bushfires, but emergency services will be assessing losses
• There have been no reports of people missing due to the fires
• An emergency warning remains in place for the Pomonal community east of the Grampians National Park
• The warning for areas near the fire in the north of the park has been downgraded to a watch and act
• The Victorian Education Department has been advised of eight school closures in western parts of the state, along with 34 early learning centres