A scorching heatwave is set to blanket parts of Australia, bringing with it sweltering days, balmy nights, and an elevated risk of bushfires. This intense heatwave is expected to impact New South Wales, Victoria, and South Australia, as a massive heatwave system moves across the continent from the northwest coast of Western Australia. This is the first major heatwave of the summer, following a record-breaking year in 2025, which was Australia's fourth-warmest year on record. The heatwave is anticipated to be severe to extreme, with daytime temperatures reaching the mid to high 40s and even minimum temperatures in the mid-20s. This prolonged heatwave is due to a large high-pressure system in the Tasman Sea, causing a weather traffic jam. The heatwave will bring daytime highs eight to 16 degrees above average and night minimums 10 to 15 degrees above average. Adelaide and Melbourne are expected to exceed 40 degrees on Wednesday, with Canberra and western Sydney experiencing similar conditions later in the week. Melbourne is predicted to cool to the low to mid-30s on Thursday, but temperatures are expected to soar again on Friday before a stronger cool change. The sea breeze in eastern Sydney will provide some relief, keeping temperatures in the low 30s for most of the week, although it could reach 39 degrees in the city itself on Saturday. Suburbs west of Olympic Park are on track for three consecutive days in the low 40s. Penrith will see temperatures of 37 degrees on Wednesday, 41 on Thursday, 41 on Friday, and 44 on Saturday, with little cooling at night. This will translate to extreme fire danger in southern parts of South Australia on Wednesday and high fire danger for much of southeastern Australia on Wednesday and Friday. The wind could pick up on Friday, leading to widespread extreme fire danger in South Australia and western Victoria, and then in eastern Victoria and southeastern NSW on Saturday, ahead of the cool change. The anniversary of the Los Angeles fires on January 6 serves as a stark reminder of the potential for massive urban fires in Australia, as warned by the Climate Council. The report highlights that climate change has worsened fire conditions, with more frequent severe fire weather and longer fire seasons. Additionally, the number of people living in bushfire-prone outer suburbs has more than doubled in Melbourne and Perth this century and risen by double-digits in other capital cities. Research suggests that less than half of Australians have emergency plans or kits prepared for bushfires, heatwaves, and other disasters. The average annual temperature for Australia in 2025 was 21.8 degrees, 1.23 degrees above the 1961-90 baseline, according to official figures. The hottest year on record was 2019, when it was 1.51 degrees above the long-term average. 2025 is tracking to be the equal second-hottest year globally, as stated by the European Union's Copernicus agency in November. This heatwave serves as a stark reminder of the urgent need to address climate change and its impacts on the environment and human safety.
