To quote from the Bureau of Meteorology:
FLOOD WARNING FOR THE MARY RIVER
Issued at 9:43 am EST on Sunday 27 January 2013 by the Bureau of Meteorology, Brisbane.
Heavy rainfall is continuing in the Mary River catchment. Further heavy rainfall of 75-100mm is expected over the upper catchment during Sunday.
At present, very strong river level rises and flooding, including areas of major flooding, are being observed across the catchment. Moderate flooding is expected at Gympie during Sunday, with
major flood levels expected overnight with further rainfall. Major flood levels are also expected at Maryborough during Monday.
Upstream of Gympie:
Minor flooding and strong river rises are occurring at Moy Pocket and Dagun Pocket. Moderate flood levels are expected at Moy Pocket during Sunday.
Major flood levels are possible at Dagun Pocket overnight Sunday.
Gympie:
Moderate flood levels are rising strongly at Gympie.
Major flood levels are likely overnight Sunday based on the rainfall forecast.
Gympie to Maryborough:
Major flooding is expected during Sunday at Miva, with major flood levels at Tiaro rising further.
Maryborough:
Minor flood levels will continue to rise at Maryborough during Sunday, with moderate flood levels expected overnight Sunday and major flood levels during Monday.
Predicted River Heights/Flows:
Gympie: Exceed major flood level (17 metres) overnight Sunday.
