Top temperatures of more than 40℃ have been predicted to last all week, before dropping to a top of 37℃ on Saturday and then 24℃ on Sunday.
Minimums are expected to be in the low to mid-20s, meaning little relief once the sun goes down.
It’s the second extended heatwave for the month, and local authorities are taking no chances when it comes to fire danger and community safety.
Warnings and closures have been pre-announced to help people avoid heat stress, starting with slight adjustments to some of the district Australia Day ceremonies yesterday.
With today expected to be the hottest of the week - last week predicted for a top of 47℃ and yesterday revised back to 44℃ - many of the Deniliquin changes are focused on today.
Edward River Council has announced changes to opening hours at the landfill and pool to coincide with the hottest day of the week - which is today.
Last week, the forecast was for a top of 47℃. AT the time of going to print yesterday is had been revised back to 44℃.
Due to the extreme conditions, the Deniliquin Landfill will be closed at 10am.
It is expected to open again Wednesday at its normal time.
The Deniliquin Community Pool hours are also changing today, because of the heat and pre-booked swim trials.
The large outdoor pool is open from 5.30am to 8am, 10.30am to 2pm and from 4pm to 6.45pm.
The medium pool, baby pool and splash park will remain open until 8pm, and the heated hydro pool will close in the afternoon due to heat.
Those looking for entertainment but who want to stay indoors are encouraged to check out the Edward River Library, which will be open and cool in hot weather.
The air-conditioned library has spaces to read, free wifi and public computers with internet access.
It is open from 10am to 5pm on weekdays (excluding public holidays) and 10am to midday on Saturdays.
Tips on how to best block and cope with the heat have been collated on one website by NSW Health, with advice including staying hydrated and seeking places where you can be cool.
To read more, go to https://www.health.nsw.gov.au/environment/beattheheat/Pages/default.aspx.