Optimise your climate risk management now

Why a 1-in-100-year event is more likely than you think
Rescue worker on a rubber boat on a river
© AlenaPaulus / Getty Images

The deceptive comfort of rare occurrences

“Such catastrophic flooding only comes along once in 100 years.” The phrase is perhaps intended to calm nerves, but in reality, it creates a false sense of security. A 1-in-100-year event is not a date in the diary; it is a 1% chance every year. However, in a warming climate, that probability is no longer anchored to the past. Portfolio managers who rely on this minimal likelihood are already learning the hard way.

Shrinking odds in practice

Europe provides some of the most striking case studies. Major floods struck in 2002, 2013 and 2021 – each in different river catchments, yet all with intensities assessed at return periods of 100 years or more. In the Ahr Valley, gauges during the 2021 disaster even registered levels consistent with 500-year events. 

While these were distinct regional events rather than statistical clustering, the overall picture is unmistakable: extreme floods are appearing more frequently across Europe within just two decades, putting into question the reliability of historic benchmarks.

The pattern is global. In 2024, natural catastrophes generated US$320 billion in overall losses, with US$140 billion insured. Each of 43 separate events exceeded US$1 billion. In the context of risk, what once seemed like outliers are becoming defining features.

Why the past is a poor guide

Yet many organisations still benchmark risk against historic recurrence intervals. On paper, that may look prudent; in practice it creates three blind spots.

  • Capital gets allocated to zones wrongly labelled “low risk.”
  • Insurance pricing and cover limits fail to match today’s hazard intensities.
  • Disclosures fall short of what regulators and investors now expect under CSRD, TCFD or ISSB.

In short: by relying on outdated odds, portfolios are mispositioned for the future.

Munich Re’s vantage point

Munich Re has tracked natural disasters for decades. Through NatCatSERVICE, our database of tens of thousands of events, we calibrate models against observed losses and align them with IPCC-consistent climate scenarios. We have distilled 140 years of underwriting experience into evidence. The result is an ability to translate shifting hazard probabilities into metrics that matter for capital, underwriting, and disclosure.

Turning probability into reality with Location Risk Intelligence

That expertise is operationalised in Location Risk Intelligence. Rather than treating “1-in-100” as a static label, Location Risk Intelligence shows what those odds mean today. Critically, it reveals how risks are likely to evolve under different climate futures. Users can screen single assets or entire portfolios for return-period intensities such as flood depths. They can also evaluate defended versus undefended scenarios or map high-risk sections along transport or energy corridors.

Beyond helping businesses to understand exposure, Location Risk Intelligence helps them to quantify it. With the Climate Change Edition, organisations can model risks out to 2100. With the Climate Financial Impact Edition, they can see the expected annual loss or 1-in-100-year damage in financial terms. With portfolio aggregation and comparison tools, they can detect concentrations and systemic hotspots before these crystallise into losses.

Closing thought: stop betting on old odds

Climate change is rewriting the probability tables faster than markets can adapt. The 1-in-100-year sticker no longer provides the consolation it once did.

At Risk Management Partners, we believe resilience begins with data integrity. By combining Munich Re’s unparalleled loss intelligence with the decision-ready analytics of Location Risk Intelligence, firms replace outdated recurrence intervals with evidence. Companies are able to leverage scenario-aware probabilities and quantified financial impacts. With that shift, portfolio managers stop betting on old odds and start managing today’s realities.

Want to keep an eye on how climate risks affect your industry?

Get the latest insights, ideas, and perspectives from Risk Management Partners – free and straight to your inbox.
    alt txt

    properties.trackTitle

    properties.trackSubtitle

    0:00
    0:00