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Weather is a major contributor to bushfires. The hotter and drier, the more likely it is for a bushfire to start and spread uncontrollably. High winds will reduce humidity, and cause an ongoing bushfire to spread more rapidly. Often these high winds are brought from off the desert areas in Australia. Therefore, the geographic process tends to be that bushfires are more common inland, rather than near the coast, where weather is drier. Bushfires move faster in hilly country. For every 10 degrees of slope gradient, the speed of the bushfire will double as it travels uphill. This is by no means the case every time, however, as bushfires are also common on the largest island in Moreton Bay (North Stradbroke Island), near Brisbane, Queensland. Not only is the weather humid, but the terrain is comparatively flat.

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15y ago

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