The last major La Niña events were in the summers of 2010-11 and 2011-12. They resulted in 2010 to 2012 being Australia’s wettest two-year period on record. Flooding was widespread and devastating. In early 2011, large parts of South-East Queensland were under water; the Lockyer Valley was hit by a cascade of water coming off the Toowoomba range and Brisbane saw its worst flooding since 1974. But Dr Watkins said this year’s event was looking weaker than 2010-11 based on the current forecast.