Homes and a shed have been destroyed as 114 fires started in one day in Victoria, mostly from lightning strikes.

Two houses and the shed were caught in the fire that started at Nangiloc, in the far north-west of Victoria on Sunday afternoon.

It was one of more than 100 fires to break out in the heat and storm battered the state on Sunday.

About lunchtime on Monday, a NSW fire crew’s vehicle responding to the ongoing fire at Little Desert National Park caught alight and was completely destroyed, Emergency Management Commissioner Rick Nugent said.

“Thankfully, the firefighters, three of them, managed to escape the vehicle before it was fully engulfed,” he said.

Temperatures hovered in the high 30s and low 40s in north-west, west, north, north-east and central parts of Victoria on Monday after a sweltering and stormy end to the weekend.

A blaze in the Little Desert National Park, about 375 kilometres west of Melbourne, was declared contained but broke away on Sunday afternoon.

Victorian authorities confirmed they received reports of property losses from a fire near Ouyen, in the far north-west of the state, on Sunday night.

It is believed two properties have been lost, Premier Jacinta Allan confirmed, as the inferno heads west towards Kaniva-Edenhope Road.

“Our thoughts are with the community around Hattah in the northwest of the state,” she said in Melbourne’s west on Monday.

State Control Centre spokesman Luke Heagerty said wind blowing in contrasting directions caused the fire to break its containment lines.

“A couple of breakaways have been able to run freely through the national park itself but once it’s reached the private property, we’ve been able to slow it down,” he said.

The Little Desert fire covers 84,000 hectares, while dual fires burning in the Grampians total 46,000 hectares.

There are additional watch and act orders for fires in Victoria’s south-west, including Apollo Bay, Cape Horn, Hordern Vale and Cape Otway.

“We’ve had thousands of lightning strikes with storms come through overnight,” Heagerty said.

Severe thunderstorms swept across Geelong and Melbourne on Sunday night, bringing heavy rain, lightning, hail and damaging winds.

Power was cut to at least 38,000 homes but fewer than 10,000 were still off the grid as of 10am Monday.

Geelong and Lara to its north were hit particularly hard with flash flooding, downed trees causing property damage and reported hail stones of up to four centimetres, the Bureau of Meteorology said.

There was 63 millimetres of rain at Lara, 52 millimetres at Avalon Airport, 48 millimetres at Clunes and 47 millimetres at Geelong.

A lightning strike is believed to have caused a fire at Taylors Lakes in Melbourne’s north-west about 1am.

The lightning and thunder across Melbourne lasted from 8pm to 3am.

“We’re getting a break now, that’s all cleared,” senior meteorologist Dean Narramore said on Monday.

“But we could see further thunderstorms develop through eastern South Australia and western and central Victoria as we move during the afternoon and evening hours.”

The storms will give way to more heat on on Monday, with forecast tops of 39 degrees for Melbourne and Bendigo, 38 for Geelong and 36 for Ballarat.

A cool change is due to move through South Australia on Tuesday afternoon before crossing into Victoria and Tasmania.

It will then be Western Australia’s turn for heatwave conditions later in the week.

On Monday, seven out of nine Victorian regions had high fire danger ratings.

-AAP