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7. Which cyclones have caused the most damage?

Assessing the overall cost of cyclones is almost impossible to objectively quantify. Most estimates are based on insured losses and so neglect the true overall cost. In the Northwest most of the economic losses are a result of the impact on the mining industry in terms of both damage and lost production. According to Emergency Management Australia (see EMA) the most costly cyclones in Western Australia include: Joan (1975) at $74M, Hazel (1979) $41M, Alby (1987) $39M, and Vance (1999) $35M. Australia's most damaging cyclone was TC Tracy that destroyed 80 per cent of houses in Darwin costing an estimated $4 billion (1998 dollars). Globally, the most costliest cyclone was Hurricane Andrew (1992) at Miami, for which unconfirmed estimates of US$20-25 billion damage have been made.

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