Sydney's air quality plummeted on Tuesday as a thick blanket of bushfire smoke clogged the city.
The haze has left the city as the 14th worst in the world on the World Air Quality Index.
A warning for severe fire danger has been issued, as temperatures soared to 37 degrees Celsius in the city's west.
Residents have also been advised to stay indoors, with the New South Wales Ambulance service emphasising that those with respiratory issues should "take extra care".
Injuries and arrests as French high school student protests spread
Dozens of people have been injured and hundreds arrested, most of them teenagers, officials said, in a wave of French student protests against teacher shortages and dilapidated buildings that on Wednesday spread to more schools across the country.
Russia hits power plants, kills four, leaves Kyiv under smoke
Russian drone and missile attacks on Kyiv and nearby areas killed four people, damaged energy infrastructure and shrouded the capital in smoke, Ukrainian officials said on Wednesday.
US forces exit remaining bases in Iraq
US forces have withdrawn from their remaining bases in Iraq on Wednesday, raising fears they will leave behind a security vacuum.
Shark stranded in South Korean canal draws 600,000 visitors as rescue bid fails
A shark stranded in a canal in the South Korean port of Busan has become the country's latest wildlife sensation, with the city saying about 600,000 people have flocked to see it over the past two weeks.
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