Black Summer
Southeastern Australia · 2019-12-01/2020-02-29
Human context
Australia's 2019-2020 fire season burned through forests that had never carried fire on this scale, killing or displacing an estimated three billion vertebrate animals. The atmospheric drivers — a record-positive Indian Ocean Dipole, a sudden stratospheric warming over Antarctica, and the driest year on record — converged to produce fire weather without modern precedent.
33 fatalities · 65,000 displaced · $103 bn in damages
Why it matters
Black Summer demonstrated that fire-weather extremes can outrun the operational fire services of a wealthy, well-prepared country. The combined failure of three normally independent climate modes — a record-positive Indian Ocean Dipole, a sudden stratospheric warming over Antarctica, and a multi-year drought — produced fire weather without precedent in the modern record. For Mediterranean-climate regions worldwide (California, southern Europe, Chile, the Cape), the lesson is that the relevant question is no longer whether such a fire season is possible, but how often the underlying climate drivers will align.
