At least eight people have been killed and some 3,300 structures have been destroyed over the past three weeks in wildfires across the state.
The rapidly expanding fires have consumed nearly 350,000 acres in the central and northern part of the state, including in the wine regions of Sonoma and Napa, which are still recovering from deadly, devastating fires in recent years.
This is the first such warning for Canberra since 2003.
Recent rains have brought the number of fires burning across Australia's east and south coast to under 100 for the first time in weeks, easing a disaster that has scorched an area roughly one-third the size of Germany.
Australian Prime Minister Morrison visited the Rural Fire Service (RFS) headquarters in Sydney, after returning on Saturday night from a holiday in Hawaii that drew sharp criticism as the wildfires crisis in his home state deepened.
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.
Authorities raise forecast for greater Sydney region to catastrophic fire danger for Tuesday, the first time the city has been rated at that level since new fire danger ratings were introduced in 2009.
Indonesia is regularly hit by slash-and-burn clearances of forests for farms and palm oil plantations. Many of the blazes smoulder deep underground in peatlands, where they can last for months.
Heatstroke kills three people in Spain as the most severe heatwave grips the continent with temperatures touching a scorching 45 degrees Celsius in some areas.
It's been one year since the fire at Grenfell Tower killed 72 people and left over 200 people homeless in London. Many of these families have still not been housed adequately, and the majority of families have not found permanent homes.
No injuries or deaths have been reported and conditions are easing, but more than 100 homes have been damaged or destroyed in the ongoing fires that have also forced 700 residents to flee their homes.
A former health and safety executive said she'd been "shocked" at the findings, concluding, "The current regulatory system for ensuring fire safety in high-rise and complex buildings is not fit for purpose."
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