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Sydney's climate appears to be becoming drier; The city has had fewer rain days in recent years than shown in the long-term climate table above. In summer, Sydney can go for long periods without rainfall. The other phenomenon that arises from these long, dry and hot periods is bushfires, which occur frequently in the areas surrounding the city.
Recent climate events such as extremely high temperatures and widespread drought have focused government and public attention on the effects of climate change in Australia. [153] Rainfall in southwestern Australia has decreased by 10–20% since the 1970s, while southeastern Australia has also experienced a moderate decline since the 1990s. [150]
March Rainfall was 74% above average for NSW, and 35% above average for Victoria however overall rain was 27% below average for Australia. A large number of sites in NSW recorded their wettest March on record, in Greater Sydney, Illawarra, Northern Rivers and the Mid North Coast saw numerous daily records and monthly records broken.
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Sydney recorded its wettest March on record with the rain gauge picking up 554 mm (21.81 in) of rain, beating 521.4 mm (20.53 in) from 1942 – this also brought Sydney's annual total up to 1,076.2 mm (42.37 in), which is the highest January-to-March total in records that date back to 1859.
Rainfall is spread throughout the year, but is slightly higher during the first half of the year when easterly winds dominate. [80] Sydney's coast generally receives around 1,000 mm (39.37 in) to 1,200 mm (47.24 in) of rain annually.
A natural disaster has been declared by the federal government of Australia after areas in the eastern portion of the country have received nearly a year's worth of rainfall in just a few days.
In response to the ongoing disaster, government officials in Australia declared a national emergency on Wednesday following the continuation of heavy rain and dangerous flooding, according to Reuters.