Australia faces an incoming danger period for severe weather from October to April, with national emergency officials and meteorological experts warning of hotter-than-average temperatures, heightened bushfire risks, and an East-West rainfall split driven by a firmly established El Niño system.
El Niño Drives Extreme Temperatures and Fire Risks
The National Emergency Management Agency (NEMA) warned that a strong El Niño is firmly established in the Pacific Ocean, where warmer-than-average sea surface temperatures are expected to continue warming the southern hemisphere through late spring and summer. According to NEMA, this climate pattern increases the likelihood of droughts, severe heatwaves, and bushfires across large parts of the country while reducing rainfall in eastern and southern regions.
Bureau of Meteorology meteorologist Caitlin Minney stated that the long-range forecast reflects a broader global warming trend, pushing minimum and maximum temperatures into the warmest 20 percent of the historical range. “Much of the south, in particular, is at a higher risk of unusually high maximum temperatures, particularly the southeast and the southwest,” Ms Minney said, adding that October-to-December minimum temperatures across almost all of Australia are very likely to fall into that unusually warm category.
Contrasting Rainfall Forecasts Across States
While eastern and southern states prepare for below-average rainfall and elevated fire dangers, Western Australia and parts of the Northern Territory face a vastly different outlook. Forecasters predict a 50 percent to 80 percent chance of unusually high rainfall across much of northern and central Western Australia, extending into the western Northern Territory, where spring totals are expected to reach between 50mm and 200mm. The primary exception in the west is its south-western corner, where below-average rainfall is likely despite total spring precipitation still maintaining a chance of reaching at least 100mm to 200mm.
Meanwhile, the Australia and New Zealand National Council for Fire and Emergency Services (AFAC) warned earlier this year of heightened bushfire risks during spring. AFAC chief executive Rob Webb highlighted that below-average rainfall in parts of Tasmania and Victoria, combined with above-average fuel loads and dry soil in parts of Western Australia, elevates the danger in those regions. “While some areas are facing an elevated risk of fire this spring, bushfires can still occur in regions with a normal seasonal outlook,” Mr Webb said, urging communities to understand local conditions and prepare early.
Severe Storms and Prolonged Heatwaves Expected
Spring also marks the peak period for severe thunderstorms, particularly along Australia’s east coast, with the storm season officially beginning in October alongside broader threats of flooding and tropical cyclones. Ms Minney noted that temperatures are considered unusually warm when exceeding threshold markers such as 24.4C in Sydney or 23.3C in Melbourne during October. While normal cold fronts will continue hitting the southeast until December, summer-like temperatures surpassing 30C—and prolonged severe heatwaves exceeding 40C—are increasingly likely before summer officially begins.
