Australia yesterday urged about a quarter of a million people to leave their homes and prepared for military support, as the authorities said that the coming hours would be "very difficult" despite the rains in some areas.

Authorities said hundreds of forest fires are burning in five of Australia's six states, many of which are on emergency preparedness.

Prime Minister Scott Morrison told reporters that army personnel are ready to move to areas of fire if things deteriorate badly, as high temperatures and wind speeds cause a dangerous situation.

Authorities sent emergency text messages to 240,000 people in Victoria asking them to leave, and urged residents in high-risk areas of New South Wales and South Australia to consider leaving, but officials did not say how many had made this appeal.

"We have issued an alert for an emergency, and we have sent text messages to 240,000 people primarily across the eastern state of the state ... If it is possible to get out, get out," state emergency commissioner Andrew Crisp told the Australian Broadcasting Corporation.

Thousands of Australians took to the streets yesterday to protest the government's failure to climate change as forest fires invaded large areas of the country, threatening wildlife and polluting the air.

Thousands of Australians took to the streets to protest the government's failure to climate change.

Hundreds of serious fires are burning in the forests and the Australian authorities fear a new heat wave.