Brisbane is in the southeast corner of Queensland, Australia. The city is centred along the Brisbane River, and its eastern suburbs line the shores of Moreton Bay. The greater Brisbane region is on the coastal plain east of the Great Dividing Range. Brisbane's metropolitan area sprawls along the Moreton Bay floodplain from Caboolture in the north to Beenleigh in the south, and across to Ipswich in the south west.
The city of Brisbane is hilly. The urban area, including the central business district, are partially elevated by spurs of the Herbert Taylor Range, such as the summit of Mount Coot-tha, reaching up to 300 metres (980 ft) and the smaller Enoggera Hill. Other prominent rises in Brisbane are Mount Gravatt and nearby Toohey Mountain. Mount Petrie at 170 metres (560 ft) and the lower rises of Highgate Hill, Mount Ommaney, Stephens Mountain and Whites Hill are dotted across the city.
The city is on a low-lying floodplain.[citation needed] Many suburban creeks criss-cross the city, increasing the risk of flooding. The city has suffered two major floods since colonisation, in 1893 and 1974. The 1974 Brisbane flood occurred partly as a result of "Cyclone Wanda". Heavy rain had fallen continuously for three weeks before the Australia Day weekend flood (26 - 27 January 1974). The flood damaged many parts of the city, especially the suburbs of Oxley, Bulimba, Rocklea, Coorparoo, Toowong and New Farm. The City Botanic gardens were inundated, leading to a new colony of mangroves forming in the City Reach of the Brisbane River.
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