Compound climate extremes and “once-in-a-century” risk communication

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Compound climate extremes are triggering large-scale, typhoon-driven flooding in regions of China not historically associated with such events, necessitating a reevaluation of risk communication. Novelty: ClaimNovelty.INCREMENTAL. Consensus alignment: ConsensusAlignment.NEUTRAL.

John S. Ji; Qihong Deng

doi:10.1016/j.lanwpc.2026.101973

September 1, 2026The Lancet Regional Health - Western PacificOpen Access

Compound climate extremes and “once-in-a-century” risk communication

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Key Points

To examine the impacts of compound climate extremes and evaluate the adequacy of conventional disaster warning and risk communication systems during unprecedented weather events.
Assessed disaster response records, meteorological data, and multi-agency emergency alert declarations during simultaneous storm events in China in July 2026.
National authorities issued top-tier red alerts for flash floods and geological hazards across Liaoning, Jilin, and Anhui provinces due to the remnant circulation of Typhoon Bavi.
Tropical Storm Maysak concurrently caused reservoir breaches and prompted large-scale evacuations over 1,500 km away in Guangxi, demonstrating multi-regional compound hazard impacts in areas historically unaccustomed to such flooding.

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Implication

Observational report reveals unprecedented concurrent flooding across distant regions in China, highlighting vulnerabilities in traditional risk communication systems.

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Ji et al. (2026) studied this question.

synapsesocial.com/papers/6a993586636c6408cfa7dbbb https://doi.org/10.1016/j.lanwpc.2026.101973

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Compound climate extremes and “once-in-a-century” risk communication

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Compound climate extremes and “once-in-a-century” risk communication

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