No Relief In Sight... It's Going To Be A Scorcher!

Complete Fire Ban

No Relief In Sight... It's Going To Be A Scorcher! Getty Images

More hot weather is on its way with no relief in sight as much of NSW continues to bake under severe heatwave conditions.

Penrith residents in western Sydney are expected to sweat through their third consecutive day over 40C on Monday and in parts of the state's far north, the mercury is forecast to go above 45C.

Wilcannia, in the state's northwest, is predicted to reach 48C while much of NSW will continue to experience temperatures on or above 40C.

The Bureau of Meteorology warned temperatures will remain at 40C across inland NSW for most of the week.

"We're not having any major changes in temperatures, unfortunately, generally over the whole state the severe heatwave is predominantly going to continue," meteorologist Jordan Notara told AAP.

"Inland parts are seeing temperatures generally staying at 40C for the next seven-day forecast."

Firefighters are keeping a close eye on bushfires across NSW with four regions - the Southern Ranges, Central Ranges, Greater Hunter and Greater Sydney - subject to total fire bans on Monday.

NSW Police has reminded motorists it's not only an offence for children or pets to be left unattended in a vehicle, but it can be deadly.