Sydney has wettest year on record with 2.2 metres of rain in 279 days

A combination of moist ocean weather cycles, low-pressure systems and climate change have combined to make 2022 the wettest year ever recorded in Sydney

In addition, a weather cycle called the Indian Ocean Dipole that affects countries around the Indian Ocean, including Australia, has recently moved into its negative phase, which is enhancing Sydney’s rainfall even further.

Finally, climate change may be exacerbating the wet conditions by raising sea surface temperatures so that there is more evaporation and more moisture in the air to fall out again as rain, says Speer. The deluge has already caused repeated flooding in Sydney, particularly in areas near the Hawkesbury and Nepean rivers, where residents have been evacuated four times this year.Heavy rain is set to continue in Sydney and other parts of the state of New South Wales over the coming days, with flood warnings in place for 50 locations.

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