Residents of Sydney suffering from respiratory conditions and underage children were warned to eliminate outdoor activities to avoid the harmful effects of "hazardous" air on November 21, 2019 – the result of continuing bushfires. /VCG Photo

Areas of the Greater Sydney were identified with an Air Quality Index (AQI) of over 1,000. Anything over 200 is considered "hazardous," according to ABC News. /VCG Photo

The Rural Fire Service of New South Wales said the haze is a mixture of bushfire smoke and dust from the Australian state's western region, which also suffers poor air quality. /VCG Photo

Devastating fires along the country's east coast have claimed six lives and destroyed more than 500 homes since mid-October, with climate change and unseasonably hot, dry conditions said to be fuelling the unprecedented blazes. /VCG Photo