Step-by-step explanation:
its calibrated maximum of 100—a level that had been reached only during the bushfires of January 1939. When the FFDI exceeds 50, it indicates ‘extreme’ danger. A value above 100 is ‘catastrophic’ danger. On 6 February 2009 it had hit 160.
Later there would be accusations, trials and even a Royal Commission to determine who or what had caused Australia’s worst natural disaster. There were many possible causes: lightning strikes, sparks from farm machinery, faulty power lines, or even arson.
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