The mercury topped 33 degrees on Wednesday and is set for 36 degrees on Thursday as Young gets its first taste of summer this season.

The Bureau of Meteorology’s seven-day forecast for Young as of Thursday predicts a top temperature of 35 degrees on Friday, 28 degrees on Saturday and 30 degrees on Sunday.

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 Towns further west of the region were expected to edge close to experiencing 40-degree days before the heatwave is over. 

Top temperatures in Young across the next few days will exceed average maximum temperatures for the summer months of December, January and February.

They are 29.2 degrees, 31.8 degrees and 30.5 degrees, respectively.

On Wednesday, Bureau of Meteorology NSW/ACT manager of weather services Jake Phillips said the heat was already building in the west of the state and it would continue to intensify “over the next day or two” while at the same time spreading east.

“One of the characteristics of heatwaves is not just hotter maximums but also hotter minimums,” he said. 

Young can expect minimum temperatures of 20 degrees on Friday, 14 degrees on Saturday and a relieving seven degrees on Sunday. The average morning temperature for November is 9.4 degrees.

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Mr Phillips said the current heatwave was the first of the season and “coming off the back of relatively mild conditions”. 

“It will potentially have more impact on the community than normal for a low intensity heatwave,” he said.

The heatwave is the result of hot air in central Australia moving into NSW.

The bureau and NSW Ambulance are advising people of all ages to be aware of the symptoms of heat exhaustion including nausea, faintness, dizziness, loss of appetite, weakness, headache and vomiting. 

“Heat can kill which is why it’s so important to stay hydrated and look out for the elderly, the young and pets,” NSW Ambulance chief superintendent Alan Morrison said.