In photos: Deadly wildfires rage across Australia

Smoke from bushfires blankets Australia's capital, Canberra, in a haze with hazardous air quality. Photo: Alex Ellinghausen/The SMHFairfax Media via Getty Images

Australian Prime Minister Scott Morrison tweeted his thanks to President Trump for his "strong messages of sympathy, support and friendship for Australia during our terrible bushfire season," after the president phoned him to offer help.

What's happening: Morrison also thanked the American people "for their many messages of support." "Australia and the US are great mates," he added Tuesday afternoon local time. As cooler, wetter conditions offered a respite to firefighters in southeast Australia, Victoria's Premier Dan Andrews posted a Facebook tribute welcoming American firefighters to the region.

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In 2018, firefighters from Australia helped fight the wildfires in California and surrounding states. Now, firefighters...

Posted by Dan Andrews on Monday, January 6, 2020

A New South Wales firefighter attempts to put out a smoldering pile of railway sleepers, which measured over 600 degrees on a thermal temperature gauge on Monday — two days after the fire front had passed through on in Wingello. Photo by Brett Hemmings/Getty Images

Firefighters tackle a wildfire in thick smoke in the town of Moruya, south of Batemans Bay, New South Wales. Photo: Peter Parks/AFP via Getty Images

People cool down at Lake Jindabyne in NSW. Photo: Saeed Khan/AFP via Getty Images

Kangaroos in Snowy Valley on the outskirts of Cooma, NSW. Photo: Saeed Khan/AFP via Getty Images

Children play at the showgrounds in the southern New South Wales town of Bega where they are camping after being evacuated from nearby sites affected by bushfires. Photo: Sean Davey/AFP via Getty Images

A water bombing helicoptor flies over the remains of a cafe destroyed by bushfires in the town of Bilpin, west of Sydney. Photo: Peter Parks/AFP via Getty Images

Burned bushland at Cunningham's Gap, some 70 miles southwest of Brisbane in the state of Queensland. Photo: Jo McGee

At the fire in charmhaven, I spotted this Possum and the baby try and crawl under a HWP car. We spent about 15 minutes...

Posted by Traffic and Highway Patrol Command - NSW Police Force on Monday, December 30, 2019

Firefighters in the Adelaide Hills, in the state of South Australia, working with locals to extinguishi a hay bales blaze and assisting with fire protection efforts. Photo: Eden Hills Country Fire Service/Facebook

"Here is a bit more footage courtesy of my brother who tried to hose everything at the factory down before evacuating with his young family. My dad and his wife lost all of their sheds and personal possessions - as they were building a house and using it for storage. It has certainly hit home - and my heart hurts for the community and all my very dear friends in the wine industry." Sheree

Posted by Udder Delights on Saturday, December 21, 2019

Helicopters dump water on bushfires as they approach homes located on the outskirts of the town of Bargo in New South Wales. Photo: David Gray/Getty Images

The sky is filled with smoke and ash in Shoalhaven Heads in NSW. Photo: Cassie Spencer/Getty Images

A firefighter at a property in Balmoral, southwest of Sydney, New South Wales. Many of those fighting the fires are volunteers. Photo: Peter ParksARKS/AFP via Getty Images

Firefighters tend to burning property in Bargo, southwest of Sydney. NSW Volunteer Fire Fighters Association's president told the Sydney Morning Herald the state and federal governments are ignoring their pleas for help with firefighting-related expenses. Photo: Peter Parks/AFP via Getty Images

A firefighter at a wildfire on the outskirts of the town of Bilpin in the Blue Mountains, west of Sydney. Photo: David Gray/Getty Images

Thick smoke blankets Sydney Harbour. Photo: James D. Morgan/Getty Images

A farmer uses a hose to put out a fire burning in his paddock and near homes on the outskirts of Bilpin. Photo: David Gray/Getty Images

The remains of a home destroyed by bushfire on the outskirts of the town of Bargo, southwest of Sydney. Photo: David Gray/Getty Images

Australian Prime Minister Scott Morrison visits fire evacuees in Picton, NSW, after cutting short his Hawaii trip following the deaths of two volunteer in the state in December. He apologized for causing upset by being on vacation during the crisis. Photo: Jenny Evans/Getty Images

Demonstrators hold up placards during a climate protest rally in Sydney. Photo: Wendell Teodoro/Zeduce/AFP via Getty Images

Burned trees after a bushfire in the Blue Mountains. Photo: Saeed Khan/AFP via Getty Images

Thick smoke envelopes Sydney Harbour Bridge. Photo: Jenny Evans/Getty Images

Fire engulfs a property in Balmoral, southwest of Sydney. Photo: Peter Parks/AFP via Getty Images

A helicopter drops fire retardant to protect a property in Balmoral. Photo: Peter Parks/AFP via Getty Images

A fire fighter and a koala watching a fire in the Adelaide Hills.

📸 :Eden Hills Country Fire Service #CFS #AdelaideHills pic.twitter.com/9LmXkdijQG

— Gary Cushway (@GaryCushway) December 22, 2019

Scenes of absolute devastation in the Adelaide Hills. Homes have been lost & livelihoods destroyed but among the scorched paddocks are many, many homes in tact. The @CFSAlerts really do an amazing job and locals had nothing but thanks & praise. #cudleecreek @abcadelaide pic.twitter.com/QiTSsh3xYl

— Claire Campbell (@clairehcampbell) December 21, 2019

Yesterday an additional 30 Canadian and 9 American personnel touched down in Sydney to assist us with the firefighting effort.

We thank them for their assistance and wish them well for their first day in the field today. #nswrfs #nswfires pic.twitter.com/xuTAu6kZVi

— NSW RFS (@NSWRFS) December 21, 2019

🔥🔌🚫 POWER REMAINS OUT, GENERATORS ON THE WAY Fire conditions have eased but power remains out in the Tambo Valley,...

Posted by ABC Gippsland on Saturday, December 21, 2019

Vineyards across the Adelaide Hills have been charred or affected by smoke from the bushfire.

More at 7pm @abcadelaide

📸 Steve Opie pic.twitter.com/jrqaUCqCSt

— Ben Nielsen (@benjnielsen) December 22, 2019

Go deeper:

• Australia fires: Thousands urged to evacuate amid extreme heat
• Thousands of koalas likely dead in Australia fires
• Australia wildfires' devastating impact on iconic wildlife

Editor's note: This article has been updated with new details on the fires and more images.