Australian authorities say a fourth person has died in a week of massive bushfires on the nation’s east coast.

The 58-year-old man’s body was found in northern New South Wales (NSW) on Thursday, days after a fire ripped through the region.

Crews are still battling over 120 fires in NSW and Queensland, but locals in Western Australia have now been warned of extremely dangerous conditions.

Police charged a 16-year-old boy with deliberately starting a damaging fire.

The alleged arson had destroyed 14 homes around the town of Yeppoon, 650km (400 miles) north of Brisbane, Queensland Police said.

Fire chiefs have warned the worst of the summer is “still ahead of us”, after expressing alarm at the scale and severity of the spring bushfires.

On Thursday, a coalition of former fire chiefs accused the government of ignoring their warnings about climate change and its potential to exacerbate fire emergencies.

“Things aren’t going to get better if our elected leaders don’t face this issue head on, and deliver the emissions reductions we need,” said Mike Brown, a former chief fire officer in Tasmania.

Who were the victims?

Since Friday, four people have died and at least 300 homes have been destroyed or damaged by fires in NSW.

Police said the latest victim was found in burnt-out bushland near Kempsey, 400km north of Sydney. He was yet to be identified.

What’s happening on the east coast?

Cooler conditions are bringing some assistance to firefighters, but many communities remain on alert.

In Queensland, crews are working to contain over 70 fires. Thousands of residents were warned to leave or defend their homes when blazes escalated on Wednesday, prompting emergency warnings.

Further south in NSW, officials said the fight was “not over yet” due to forecasts of rising temperatures ahead of the weekend.

“Even in these pretty benign conditions we’re seeing quite a lot of aggressive fire behaviour simply because it’s so dry,” said Rural Fire Service Deputy Commissioner Rob Rogers.

More than one million hectares have been burnt across the state since September. The greater Sydney area was issued with its first ever “catastrophic” fire warning on Tuesday, with officials expressing relief no lives were lost on that day.