Albury-Wodonga is expecting a maximum of 42 degrees on Thursday, 43 on Friday, and 42 on Saturday.

On Sunday the maximum temperature will drop slightly to 35 degrees, before increasing to 37 on Monday and 38 on Tuesday.

Ambulance Victoria reported there was an increase in triple zero calls in the north of the state which they expect is partly related to heat.

A total fire ban has been issued across both the Southern Riverina and Northern Victoria district. No fires are allowed to be lit across either district.

A Victoria-wide total fire ban will follow on Friday, while NSW has declared a state-wide total fire ban until Sunday.

Deputy Commissioner Rob Rogers said RFS hoped it would prevent further fires.

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"There are currently more than 100 fires burning across NSW and more hot, dry and windy conditions expected, there is an increased risk to the community this week," he said.

"Under these conditions the risk of fire is significant and we ask people to ensure that both their family and their property are prepared."

Indi member Helen Haines has cautioned people to prepare for what's expected to be one of North East's most challenging bushfire seasons.

"The landscape is very dry following prolonged periods of lower or much lower than average rainfall, as we can all see and sense," she said.

"Rain is not expected before February - at the earliest - and the outlook is similar to the worst fire years on record.

"These signs are serious - as we have seen in NSW and Queensland in the past month - and we can't afford to ignore them in a region like ours with a high fire-risk history."

Meteorologist Sarah Scully said much of the country would experience severe to extreme heatwaves this week.

"We're closely monitoring the development and progression of this heat but based on current forecasts we could see that record broken this week," he said.

"For many areas, severe to extreme heatwave conditions will be felt, so it's important people follow the advice of health authorities, stay up to date with the latest forecasts and warnings from the Bureau and remember to check in on any vulnerable family and friends."

On Wednesday, Ambulance Victoria issued warning to residents with Director of Emergency Management Justin Dunlop saying this week's hot weather could catch many off-guard.

"With dry, windy and close to 40 degree days predicted, we want everyone to be alert to the symptoms of heat-related illnesses which include heat rash, muscle cramps, heavy sweating, paleness, dizziness, nausea, vomiting and fainting," he said.

"We are asking the community to be mindful of the impact heat has on them but also their neighbours, with infants, the elderly, expecting and breastfeeding mothers and people with some pre-existing medical conditions, most vulnerable in this weather."