In the past 48 hours, Prime Minister Scott Morrison has fielded a number of calls from world leaders offering messages of support as Australia deals with the bushfire crisis.
US President Donald Trump called to offer his condolences, the federal government confirmed.
Mr Morrison said he thanked President Trump for sending US firefighters to Australia to help fight the fires, adding that he appreciated the well-wishes of Americans during this time.
British Prime Minister Boris Johnson said he has spoken personally with Mr Morrison and offered aid.
"Our hearts go out to all those in Australia affected by these devastating fires," he said in a message on Twitter.
"We stand with you at this very difficult time."
Fiji's leader, Frank Bainimarama, said his country stands ready to offer any assistance it can.
Vanuatu's Acting Prime Minister, Jotham Napat, said his government would commit nearly A$250,000 (20 million vatus) in aid to help Australia's bushfire victims.
"As a Pacific neighbour and friend, we have watched as Australia has been devastated by these horrific bushfires," he wrote in a post on Facebook.
"We offer whatever assistance we can in this time of need, as Australia has always done in ours."
Papua New Guinea says it has at the ready 1,000 personnel, including soldiers and firefighters, who can be deployed at Australia's request.
Rain provides some respite ahead of dangerous fire conditions
Meanwhile, firefighters around NSW are enjoying a "psychological and emotional" reprieve from dangerous bushfire conditions but authorities say containment remains a priority before the return of warmer weather.
Scattered showers are expected to continue falling on NSW fire grounds until Wednesday as attention turns to getting scorched towns up and running.
More than 13mm fell at Merimbula on Monday and 9.8mm at Bega.
A smoldering log is pictured in the Wingello State Forest on January 6, 2020. Source: Getty Images
"It's not widespread amazing falls, but there is some falling from the sky," Bureau of Meteorology forecaster Gabrielle Woodhouse told AAP.
All emergency bushfire warnings in Victoria have been downgraded after rainfall provided some respite, but conditions are expected to deteriorate again on Friday.
There have been 24 deaths this bushfire season and more than 1600 homes have been lost, with almost six million hectares across Australia having been burnt, which is about the size of the Republic of Ireland.
Two people remain unaccounted for in NSW where there has already been 19 fatalities, and Victoria and South Australia have reported two and three deaths respectively.
Elevated fire danger on Friday
Yet 130 fires continue to burn across NSW, with up to 50 uncontained and more than 2600 firefighters working in the field on Tuesday.
Rural Fire Service commissioner Shane Fitzsimmons said firefighters would continue to work on establishing containment lines and back-burning before elevated fire danger returns on Friday to NSW.
However, Friday's weather is not likely to be as severe as Saturday, when huge swathes of bush and hundreds of homes were razed on the south coast.
"While we want to bring a lot of the fires under control, what we're still focusing on primarily is shoring up protection to limit the potential for fire fronts to continue to impact more communities," Mr Fitzsimmons told ABC TV.
Firefighters contain a small bushfire which closed the Princes Highway south of Ulladulla, 5 January 2020. Source: AAP
"There's a combination of suppression and mopping up and patrolling.
"It was nice to see a cyclone forming up the top end of WA which is hopefully a signal that we may see monsoon activity which will disrupt the dominant hot air mass continuing to influence so much of the weather."
The Voyager Point fire in Liverpool, New South Wales. Source: NSW Rural Fire Service
Bushfire effects felt around the country
South Australia's tourist hotspot Kangaroo Island is one of more than 100 fires still burning across the country.
In an unprecedented move, almost 500 Army reservists have been called to help in the bushfire response and that number could reach 3000.
There are around 300 people waiting to be evacuated from the coastal town of Mallacoota where aircraft have been grounded by smoke.
A smoke haze sits above Melbourne and Canberra - which recorded the worst air quality of any major city in the world on Monday - and the smoke has even made its way to New Zealand.
Residents from the fire ravaged community of Mallacoota are evacuated by helicopter. Source: Australian Department of Defence
Some estimates suggest 500 million animals have died in the fires.
Call for support staff in NSW fire-hit communities
Mr Fitzsimmons said the HMAS Adelaide remains on stand-by and is assisting fire authorities with resupplying and refuelling.
NSW Transport Minister and Bega MP Andrew Constance, meanwhile, called on the government to get support staff into fire-ravaged areas as soon as possible as communities grapple with "unimaginable grief".
Save The Children says it will roll out more child-friendly spaces to allow kids up to 12 to process their experiences with early childhood specialists.
Residents prepare to defend property
Bundanoon couple Dianne Ross and Michael Hutchinson said evacuating on Saturday helped them become determined to make a plan to defend their home.
"We're not going to play 'we're going to defend until the place is on fire' but we'll defend it as much as possible," Mr Hutchinson told AAP.
Ten people have died battling or trying to escape bushfires since December 30, taking to 19 the number dead this season.
An estimated 2800 livestock are among millions of animals believed to have been killed.
Some 4.8 million hectares - equal to the metro areas of the five mainland state capitals - have been burnt in NSW this season, taking with it at least 1466 homes, 100 facilities and 2339 outbuildings such as sheds.
A person from south of Bombala in southern NSW remains missing.
With AAP...
