Sydney – A prolonged and extraordinary period of unseasonable warmth, now entering its fourth consecutive day, is enveloping a vast expanse of Australia, elevating the risk of wildfires and signaling an early onset to an exceptionally hot and dry warm season.
Northern Victoria, inland New South Wales (NSW), and inland South Australia are all bracing for temperatures on Monday that are expected to soar 10 to 16 degrees Celsius above the seasonal norm. Port Augusta in South Australia is projected to reach 39 degrees Celsius, while Penrith in NSW is set to hit 37 degrees Celsius, with Sydney forecasted to reach 31 degrees Celsius.
Meteorologist Dean Narramore of the Bureau of Meteorology characterized this sustained spell of elevated temperatures across various regions of Australia as “highly unusual,” particularly for this time of year.
The protracted heatwave is attributed to a large, sluggish high-pressure system that is drawing warm air from central and northern Australia into the southeast. South Australia bore witness to September heat records being shattered on Sunday, with Ceduna recording a scorching 39.8 degrees Celsius.
As this heat migrates eastward, temperatures are anticipated to climb even higher in NSW on Tuesday and Wednesday. The Bureau of Meteorology has issued a severe heatwave warning for the state’s south coast, while extreme fire conditions are predicted for the south coast on Tuesday, followed by Sydney and the Hunter Valley on Wednesday.
This heatwave is expected to relent on Wednesday when a cold front sweeps across the entire southeast, ushering in strong winds, showers, and even some snowfall in parts of alpine Victoria and Tasmania, according to Narramore.
For Sydney, temperatures are anticipated to plummet from 34 degrees Celsius to 21 degrees Celsius with the arrival of the cool change on Wednesday evening, accompanied by blustery winds and intermittent showers.
Despite the heatwave, firefighters in New South Wales were already responding to grass fires in Riverwood, southwest Sydney, and Kangy Angy, north of Gosford, on Monday morning. Another bushfire, located in Razorback, north of Picton, was reported to be under control.
Meanwhile, Queensland’s Fire and Emergency Services issued evacuation orders for residents of the rural town of Emerald and Beerwah on the Sunshine Coast on Sunday. By Monday, residents in affected areas were being advised to stay informed and avoid smoke.
James Haig, the executive manager for bushfire mitigation at the Queensland Fire and Emergency Services, stressed the importance of bushfire preparedness due to the early commencement of the bushfire season. He urged individuals to establish and execute a pre-emptive bushfire survival plan.
The Australian Red Cross echoed this plea, revealing that new data indicated only 10% of people were actively preparing for emergencies, despite 58% of Australians, more than double the figure from five years ago, being likely to encounter heatwaves over the next 12 months.
Penny Harrison of the Australian Red Cross emphasized that concern about potential emergencies needed to translate into concrete preparations. She highlighted that preparedness substantially enhanced the ability to respond and recover from emergency situations.
Sydney residents have been cautioned to brace for a high-risk bushfire season this summer, exacerbated by abundant vegetation growth, which has contributed to heightened fuel loads in anticipation of the forthcoming bushfire season.
Although the Bureau of Meteorology has yet to officially declare an El Niño for the upcoming summer, meteorologist Dylan Bird indicated last week that the agency was closely monitoring climate indicators, and an El Niño, which now has a 70% probability of forming, was “highly likely.”
Following the warmest winter on record, the Bureau of Meteorology is anticipating a hotter and drier summer for much of Australia, driven by the potential emergence of El Niño and the development of the Indian Ocean dipole.
