The giant prehistoric trees were thought to be extinct until 1994, but then authorities found 200 of them in a national park near the Blue Mountains north-west of Sydney.
Authorities were assessing the damage after firefighters battled flames fanned by strong winds through the night and lightning strikes sparked new blazes in New South Wales and Victoria.
Australia’s most populous state was paralysed by “catastrophic” fire conditions amid soaring temperatures, while one person died as wildfires also ravaged the country’s southeast.
Thousands of firefighters have been deployed to try and extinguish the flames.
Evacuations have been ordered in Queensland state, as nearly 150 fires continue to rampage across two states, with officials warning of weeks of danger yet to come.
More than 180,000 people have been ordered to evacuate their homes in Sonoma County north of San Francisco because of the wind-fueled "Kincade Fire."
Temperatures soared in Spain amid European heatwave, causing wildfire to devour land as hundreds of firefighters battled the blaze through the night.
The deaths occurred after a change of wind Sunday as the firefighters were battling the blaze in a rugged area at an altitude of 3,800 meters.
Helicopters being used to fight the fire have at times been diverted to douse other flare-ups in New Zealand's South Island, including one on tree- covered hills bordering Nelson city which is home to about 50,000 people.
The committee of forestry and safety engineering experts from some of Greece's leading universities was ordered formed by Prime Minister Alexis Tsipras after the July 23 wildfire in the coastal resort of Mati.
Fire crews evacuated the block on Erlanger Street but were still fighting the flames. Many of those affected, took refused in nearby roofs.
Multiple wildfires rage across California, including near Los Angeles, forcing evacuations in the upscale beach community of Malibu. A quarter of a million people are under evacuation orders.
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