The insurance sector is bracing after the Bureau of Meteorology (BoM) issued a stark warning about the convergence of multiple climate drivers expected to deliver record-breaking heat, violent storms and renewed flood threats across south-east Australia.
The next 36 hours alone are forecast to bring a mix of “record October heat”, bushfire risk, and gale-force winds as a deep low-pressure system crosses South Australia and Victoria. For some coastal regions, gusts could reach speeds equivalent to a category 2 tropical cyclone.
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But meteorologists and industry experts say the danger won’t end when the front passes. Instead, the country is heading into what could be one of its most complex and damaging summer seasons in years — shaped by abnormally warm seas, a negative Indian Ocean Dipole and the growing likelihood of a weak La Niña.
BoM senior forecaster Angus Hines said the combination of saturated catchments and a wetter-than-average outlook poses a clear hazard for key population centres.
“With high water storages and increased soil moisture into the lower layers, there’s an increased risk of riverine flooding for Queensland, NSW and northern Victoria,” he said.
“There is always a risk of tropical cyclones during our peak season between November and April. There has always been at least one tropical cyclone make landfall on the Australian coast each season.”
The Bureau also expects warmer days and nights across large parts of the country, particularly in Victoria and Tasmania — conditions that increase the potential for compound losses such as flooding followed by heat damage or mould outbreaks.
After consecutive years of record catastrophe losses, insurers are again facing a cocktail of exposures. The Insurance Council of Australia (ICA) has warned that affordability pressures in flood-prone communities remain acute, with many households still uninsured.
ICA chief executive Andrew Hall said: “Australia really is at the forefront of dealing with extreme weather events,” urging governments to fund mitigation works. “Projects like flood levees that will actually protect properties, projects like home strengthening against cyclone and bushfire risk. As we think about the challenges moving forward, building more homes in Australia, we’re going to have to make sure those homes are built in a durable and resilient way.”
Meteorologists are also watching unusually warm oceans — including a vast marine heatwave in the North Pacific dubbed “The Blob” — that could amplify humidity, slow storm movement and increase rainfall totals. Climate scientist Daniel Swain told CNN the phenomenon was “phenomenal [and] really remarkable”.
In Australian waters, similar temperature anomalies have been linked to coral bleaching, algal blooms and marine die-offs. “Early reports suggest [the deaths] are temperature-related and, as a consequence, there is low oxygen in the water,” marine biologist Dr Leonardo Guida told The Guardian.
Reinsurers and local carriers are already factoring in the heightened probability of multiple concurrent events — floods, cyclones, hailstorms and bushfires — that could strain loss ratios, supply chains and catastrophe response capacity.
Australian Prudential Regulation Authority (APRA) executive board member Suzanne Smith recently underscored the need for capital resilience and risk discipline, warning that “each claim filed tests how well those expectations are met”.
She said innovation would be vital, adding: “AI shows considerable potential in areas such as underwriting, claims processes, cybersecurity, fraud detection, and crisis prevention,” while urging clearer communication around pricing drivers.
Stone Lane Broking & Risk Advisory director Shane Brady said, “The ‘Blob’ phenomenon is a powerful example of the butterfly effect in action — how distant events can have tangible impacts on seemingly unrelated things. Volatile weather systems generally make risk modelling a complex task but it appears this 2025-2026 summer may be particularly difficult to navigate for insurers.”
He advised brokers to bring forward renewals, review policy deductibles and ensure high-risk clients understand sub-limits and exclusions. “We can also assess the resilience levels of commercial assets with things like roof and drainage resilience reports and, in all cases, encourage early renewal negotiations for higher-risk locations,” he said.
For insurers, the message is clear: this is a season that will test balance sheets, catastrophe modelling and customer expectations in equal measure.
With parts of NSW and Queensland already facing early-season fire danger, and storm systems gathering off the southern coast, the coming weeks may prove a critical first test of how well the sector has absorbed the lessons of Australia’s recent run of billion-dollar disasters.
