They're working round the clock and putting their lives on the line to save lives and property from raging fires.

It's no wonder that volunteer firefighters' courage and dedication has prompted an outpouring of gratitude.

As well as donations to firefighting services, some Australians are getting creative in how they say thank you to the men and women on the frontline.

Some messages are best seen from the air with several homeowners writing messages on their driveways or roofs.

Our firefighters have received many thank you letters and signs posted on homes over the past months. Here is a special one, we assume made specially for our aviation teams to find. We love how creative some of these messages are. See if you can spot it. Thank you. #nswrfs pic.twitter.com/tNMvv6QJLV — NSW RFS (@NSWRFS) January 9, 2020

Sometimes a photo can say a thousand words. This one snapped yesterday by one of our Air Attack Supervisors from above.

Thank you for all the kind messages of support.#NSWRFS #NSWfires pic.twitter.com/hVgMfw4j50 — NSW RFS (@NSWRFS) January 7, 2020

"Our firefighters have received many thank you letters and signs posted on homes over the past months. Here is a special one, we assume made specially for our aviation teams to find," the NSW Rural Fire Service tweeted.

US firefighters who have flown in to help local crews with the bushfire effort were given a heroes' welcome at Sydney airport on Thursday.

NSW RFS Commissioner Shane Fitzsimmons said the spontaneous round of applause reflected the gratitute and admiration Australians have for their firefighting friends from across the Pacific.

US fire fighters arrived at Sydney Int Airport this week, on their way to assist with fire fighting in Victoria.

Coming through, all gathered gave a spontaneous & lengthy round of applause, reflecting the gratitude & admiration we all have for their generosity. #NSWRFS @NSWRFS pic.twitter.com/5epg5y4qxX — Shane Fitzsimmons (@RFSCommissioner) January 9, 2020

Australian cricketers have also done their bit to boost spirits of exhausted firefighters, using their day off to visit the RFS Sydney headquarters and bushfire-affected areas including Wingello and Southern Highlands on Wednesday.

Captain Tim Paine and Nathan Lyon posed for photographs with RFS members and praised the efforts of fire crews.

Huge boost for the team here at #NSWRFS State Ops, with a visit from our Australian Cricket Champions, Captain Tim Paine and Nathan Lyon. They've taken time out to visit some of firefighters and affected areas today. We were all a little 'bowled over' really. Thanks fellas pic.twitter.com/5da1a4cOcT — Shane Fitzsimmons (@RFSCommissioner) January 8, 2020

"When you do see it you realise the bravery, just the flat out bravery of our firemen and women that have come out here to try and save lives and save property has been an unbelievable effort so we thought it was really important for us to come out here and say thank you," Paine said.

Children have also been keen to express their gratitude to firefighters, making special cards and notes for the volunteers.

The artwork has been saved and is now displayed at NSW RFS headquarters.

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The messages mean a lot to firefighters as Victoria Country Fire Authority volunteer Andre Smith explained in an opinion piece in Nine newspapers this week.

He described the generosity of business owners and strangers whenever they managed to take a break from battling blazes.

"Managers order us to put our wallets away with a smile, even though business of any kind is sorely needed right now in communities already hit hard by drought."

These brave firefighters from Canada are flying home today. A huge thank you to all of the international firies for their help and bravery. Our teams will be in our terminals this week raising funds for Red Cross Disaster Relief. Here’s the link to donate: https://t.co/q0bmubLCcK pic.twitter.com/se8F84pWXR — Sydney Airport ✈️ (@SydneyAirport) January 9, 2020

At 5pm on Christmas Day, there are 74 bush and grass fires burning across NSW. All fires are at advice level. The north of the state has seen some good rainfall helping firefighting efforts. Further south, firefighters strengthened containment lines. #nswrfs Credit: Jason Palmer pic.twitter.com/2oXdBzY6t7