"Levees come in varying standards," emphasized Rhys Whitley, Suncorp's scientific specialist, during Friday's session. "Each levee is designed with a specific flood height in mind. Installing levees generally provides significant community protection and can lead to decreased insurance premiums, but not all levees offer the same level of security."
Dr. Whitley was addressing a query from the Senate select committee, which wanted to understand why some communities haven't seen insurance premium reductions despite levee construction. "Levees can be engineered for different return periods, such as a one-in-20-year or a one-in-100-year flood event," he explained. "If a levee is built to lower standards, it can be overtopped by sufficiently extreme weather events."
"Additionally," Whitley noted, "levee design standards often rely on historical data, which can be sparse and non-continuous across Australia. We cannot solely depend on human observations since weather systems are capable of producing events beyond our historical experience, such as the 2022 east coast floods."
The Senate committee's hearings, which took place in Ballina, NSW, on Thursday and Brisbane on Friday, saw testimony from community representatives and councils who voiced their frustrations about insurers' pricing and response strategies post-disaster. Suncorp and RACQ Insurance were the only insurers to appear before the committee.
When questioned about climate change's effect on premiums, Dr. Whitley commented, “Addressing climate change might cause a minor impact, perhaps smaller than the annual inflation rate, typically under one percent year-on-year. However, it is crucial not to overlook natural climate variability's role."
He further explained that climate change is expected to increase the frequency and severity of extreme weather occurrences. "Predicting the rate of this change is challenging due to natural climate cycles and fluctuations," he said. "It's difficult to attribute specific weather events solely to climate change. Nevertheless, such events offer clear indications of shifting risk profiles, which we must factor in when determining insurance premiums."
This perspective underscores the importance of differentiating between the inherent risks of natural variability and the additional layer of complexity introduced by a changing climate, presenting ongoing challenges for both insurers and communities in adapting and mitigating risks effectively.
