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🌋 '''Catastrophe peril''' denotes any natural or man-made hazard capable of producing [[Definition:Catastrophe (CAT) | catastrophic]] [[Definition:Loss | losses]] across a large number of [[Definition:Insurance policy | insured risks]] simultaneously. In [[Definition:Property insurance | property]] and [[Definition:Casualty insurance | casualty]] insurance, the primary natural catastrophe perils include [[Definition:Hurricane | tropical cyclone]] (hurricane/typhoon), [[Definition:Earthquake | earthquake]], [[Definition:Severe convective storm | severe convective storm]] (tornado, hail, straight-line wind), [[Definition:Wildfire | wildfire]], [[Definition:Flood | flood]], and [[Definition:Winter storm | winter storm]]. Man-made catastrophe perils — [[Definition:Terrorism risk | terrorism]], industrial explosions, and [[Definition:Cyber risk | cyberattacks]] on critical infrastructure — round out the spectrum.

🔎 Each peril carries distinct characteristics that shape how [[Definition:Underwriter | underwriters]] and [[Definition:Catastrophe modeler | catastrophe modelers]] assess it. Earthquake risk, for instance, features extremely long return periods for the largest events but devastating severity when they strike; [[Definition:Severe convective storm | severe convective storms]], by contrast, occur frequently but individually produce smaller losses, though in aggregate they can rival hurricane-season costs. [[Definition:Catastrophe modeling | Catastrophe models]] are built peril by peril, each with its own hazard module, [[Definition:Vulnerability function | vulnerability functions]], and loss-estimation methodology. [[Definition:Insurance carrier | Carriers]] and [[Definition:Reinsurer | reinsurers]] track their [[Definition:Catastrophe exposure | exposure]] on a per-peril basis and often buy [[Definition:Catastrophe reinsurance | reinsurance]] programs structured around specific perils — a hurricane [[Definition:Excess of loss reinsurance | excess-of-loss]] layer, for example, may sit alongside a separate earthquake treaty.

🧭 Understanding the full inventory of catastrophe perils — and how they interact — is foundational to sound [[Definition:Risk management | risk management]]. Some perils correlate: a major earthquake can trigger [[Definition:Tsunami | tsunami]] and [[Definition:Fire following earthquake | fire following earthquake]], compounding losses far beyond the initial ground shaking. Others evolve over time; [[Definition:Climate risk | climate change]] is intensifying wildfire seasons, expanding flood zones, and potentially altering tropical cyclone behavior in ways that historical data alone cannot capture. Insurers that fail to continuously reassess their peril landscape risk mispricing coverage and underestimating the [[Definition:Capital | capital]] needed to remain solvent through extreme scenarios.

'''Related concepts:'''
{{Div col|colwidth=20em}}
* [[Definition:Catastrophe (CAT)]]
* [[Definition:Catastrophe modeling]]
* [[Definition:Catastrophe exposure]]
* [[Definition:Natural catastrophe]]
* [[Definition:Man-made catastrophe]]
* [[Definition:Climate risk]]
{{Div col end}}

Definition:Catastrophe peril - Revision history

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