Fires in Victoria's west and near the Great Ocean Road still ...

Fire authorities believe a bushfire that destroyed at least one property in Victoria's west over the weekend may have been deliberately lit.

Victoria's bushfire situation eased overnight, but a Watch and Act alert remains in place for a blaze burning near Kadnook, in the Wimmera, with residents told it's not yet safe to return to the area.

A fire at Yuulong, near the Great Ocean Road has been downgraded to advice level after residents were advised yesterday to leave the area.

At least one home was destroyed over the weekend near Kadnook, and there are fears two more homes may have been lost in blazes.

CFA assistant chief fire officer Mark Gunning said investigators believe the fire did not start accidentally.

"[Fire investigators] have been out there yesterday they'll be out there again today, and they're working with police to work through the cause but at this stage we've ruled out that we believe it to be accidental so that's a concern to us as well," he said.

"We are treating it as suspicious at this point in time"

Hot and windy conditions on Saturday saw the spread of several fires across hundreds of hectares of land, with communities in the state's west urged to evacuate.

Rain and cooler conditions have helped firefighters get on top of blazes, however the Country Fire Authority said fires in the state's west could burn for weeks.

The Country Fire Authority thinks the blaze in the state's west could burn for days yet. (ABC News)

Edenhope deputy group officer Stuart Grigg said the blaze in the Wimmera is proving to be challenging for fire crews.

"The worst part we've got is this has all happened at the start of the fire season, and we're probably going to have to deal with this for quite a long time yet, which is really going to be tough on resources," he said.

Mayor of West Wimmera Shire, Tim Meyer, said the fast-moving fire caught many people by surprise.

"It's been a horrifying weekend and it's been really tough," he told ABC News Breakfast.

Mr Meyer said several sheds and farming infrastructure had been destroyed as well as the one property which has so far been confirmed lost.

"The crews I'm sure they've been battling away and are fairly exhausted," he said

"I know there's a few strike teams heading there today and a few more tomorrow to help out but it's been an extraordinary effort from the local volunteers that's for sure."

Luke Hegarty from the State Control Centre said fire authorities were monitoring conditions ahead of more forecast hot weather this coming weekend.

"We're looking at the moment like we might not see the same winds that we saw on Saturday but it does look like it could be a couple of days of quite high temperatures," he said.

"It's a reminder also that we are now in summer and a lot of areas in the state are just starting to move into fire restrictions if they haven't already."

The fire burning near the Great Ocean Road caught some people by surprise over the weekend.

Melbourne resident Zain Wasif said he was woken at 6am on Sunday by fire authorities urging campers to move on as the fire was only 30 kilometres away. 

Mr Wasif said he and his friends were swimming at Apollo Bay on Saturday afternoon when they started to smell smoke.

"Yeah you look over the mountain, the hills near Apollo Bay and there's just huge amounts of smoke," he said.

"It looked like a volcano eruption, kind of thing, like just huge amounts of smoke, in the distance."

Meanwhile, hundreds of people remain without power after wild weather hit parts of the state over the weekend.

Around 600 properties are still without electricity in the state's north-east after thunderstorms and strong winds brought down powerlines on Sunday.