A stream of northwesterly winds will transport a pool of hot air from central Australia across NSW during the second half of this week, says forecasting service Weatherzone.
According to the Bureau of Meteorology, a low-intensity heatwave will affect many areas of western NSW between today and Friday. The hot air will contract to eastern and northeast NSW from the weekend, where a low-intensity to locally severe heatwave will continue into the start of next week.
Weatherzone says heatwaves in Australia are defined as three or more days and nights where temperatures remain unusually high, relative to a location's long-term average and the temperatures observed during the last 30 days.
The temperature threshold for heatwaves differs for each part of Australia an...