A lot of misinformation has been circulating online that puts all the blame for Australia’s unprecedented fires on arson or green policies – anything other than climate change. Spreading the myth that most fires were deliberately lit is a diversion that is both dangerous and wrong. Here is a fact check tackling some of the rumours:
The fires in Australia – which are still burning – have so far killed 29 people and an estimated one billion animals, scorching 17.1 million hectares, more than two-thirds the size of the United Kingdom.
This devastation of epic proportions has got some journalists and politicians in Australia rushing to find someone to blame. While most now realise the scale of the damage is down to climate change, many people have been misled into thinking a lot of the fires were deliberately lit, for example.
This has been reported as a coordinated effort to shift blame away from climate change in order to protect Australia’s leaders – who have no credible climate action plans. Those who are rightly devastated at the loss of life, homes, livelihoods and nature deserve the truth.

Is it true that the fires are no worse than in previous years?
No. They are unprecedented.
The fires started months before they usually do, and have continued to rage during an unprecedented drought and an unprecedented heatwave.
The Australian weather bureau has confirmed that 2019 was the nation’s warmest and driest year on record. And while there have been other really bad fire years, scientists have confirmed that conditions this summer are fundamentally worse.
Australia’s usual bushfire season started in spring rather than the more usual summer – and hit much harder because of the hot, dry conditions. Rainfall was reportedly 40% lower across the country last year. The Climate Council – an Australian climate change organisation – reported that, in some parts of New South Wales, fire services have pushed the start of the “danger period” for fires from October to August.
A coalition of former fire chiefs has been trying to meet with the prime minister since April 2019, as they feared this fire season would be longer and deadlier because of the climate crisis. They allege that current chiefs have been locked out of discussions and were “not allowed” to mention climate change.
© Emeran Gainville / GreenpeaceWere the fires deliberately lit by arsonists?
No.
Australia has just experienced its hottest, driest year on record, creating tinderbox-like conditions. Every year in Australia, fires are started by any number of things. They can start accidentally through a spark from a chainsaw or from a barbeque.
Rural Fire Services have said some of the biggest fires in New South Wales were started by “dry lightning”. This occurs without any accompanying rain reaching the ground and strikes dried-up land and vegetation. Some fires are even generating their own thunderstorms, which creates lightning, which then starts more fires.
So the unprecedented nature of these fires is not because there has been a sudden increase in malicious activity: it’s because of climate change.
But powerful voices around the world have helped spread the rumour that fires were deliberately lit. Academics researching Twitter concluded that this was the result of a coordinated online disinformation campaign, which used bots to drive certain hashtags into social media. This ultimately spread the lie that climate change wasn’t to blame after all.
This lie has spread so far that even a UK government minister said in the Commons that “it has been widely reported on social media that 75% of the fires were started by arsonists”. However, experts estimate that only about 1% (at most) of the fires were deliberately lit in NSW and Victoria.
© Dean Sewell / Greenpeace
© Cole Bennetts / Greenpeace © Cole Bennetts / Greenpeace” alt=”Smoke Haze in Sydney, NSW.
© Dean Sewell / Greenpeace © Dean Sewell / Greenpeace” alt=”Climate emergency rally at Sydney Town Hall, NSW.

