Key Points
- Heatwave conditions are set to persist across Australia.
- The BoM expects maximum and minimum temperatures to be 5C to 12C above average throughout the rest of the week.
- People should reduce outdoor activity during the hottest parts of the day as much as possible.
Heatwave conditions are set to persist for large swathes of the country with a cool change not expected until later in the week.
A wave of hot weather had some regions swelter through temperatures that peaked in their mid-40s on Tuesday.
But the wave is not over yet with the weather bureau forecasting both maximum and minimum temperatures to be 5C to 12C above average throughout the rest of the week.
For NSW, temperatures are set to reach the mid-30s to low-40s during the day and low to high 20s overnight with the mercury at its highest on Thursday and Friday.
Severe heatwave conditions will develop across the central and northern inland parts of the state, spreading east towards Sydney, the Hunter and Mid North Coast on Wednesday and Thursday.
Armidale, Camden, Campbelltown, Hornsby, Liverpool, Moree, Nowra, Orange, Richmond and Wollongong are all set to bear the brunt of the heat.
Some regions in the northwest slopes and plains such as Walgett are expected to reach 42C while parts of upper western NSW including Wilcannia could peak at 46C.
NSW State Emergency Operations Controller, Deputy Commissioner for Emergency Management Peter Thurtell urged people to watch out for heat stroke or heat exhaustion.
Severe heatwave conditions are also forecast for South Australia's northwest, northeast and Flinders regions with some areas expected to hit the mid-40s.
It will be another scorching day for the southern state after its capital nudged more than 41C on Tuesday afternoon, the first more than 40C day of the year.
Extreme fire dangers are also forecast for parts of the Pilbara coast on Wednesday.
Bureau of Meteorology spokeswoman Morgan Pumpa said people should reduce outdoor activity during the hottest parts of the day as much as possible, check in on vulnerable neighbours and keep an eye on their pets.
"Once we move up in that range of the severity of heatwaves, people do need to take extra actions to stay safe," she said.
