Fortunately for us, there haven't been any significant bushfires in the Ku-ring-gai national park that is close to where we live, so our house isn't in danger. But the impact of the massive, unprecedented bushfires raging through many of the national parks in NSW is clearly visible in the data from the Air Quality monitoring station that is closest to us (at Macquarie University). The results come from https://www.dpie.nsw.gov.au/air-quality/search-for-and-download-air-quality-data
The chart shows average hourly reading of visibility (ie. smoke concentration) and small particles (PM2.5) since 1 July. You can see when the first widespread fires started to impact Sydney air quality in October, and how bad air quality has been this season so far.
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