Wildfire season used to feel like a distant headline, floods like isolated events and hailstorms like rare surprises. Today any one of them can shut your factories, snarl your supply chain and erase quarterly earnings within hours.
A recent insurance trade analysis found that secondary perils drove 99.9% of North American insured catastrophe losses in 2025. Wildfires and severe convective storms alone accounted for 86 billion dollars of the 90 billion dollar total, proving that the “smaller” hazards you once tracked on the margins have moved to center stage.
Such numbers reveal a deeper reality. Extreme weather is intensifying, assets are spreading into risk-prone zones and business models lean on complex interdependent networks that amplify any disruption. The US Environmental Protection Agency reports that heavy downpours have grown more frequent and intense, pushing drainage systems past their limits and raising flood risk. The same escalation is playing out with wildfire, hail and even landslides, turning once-peripheral dangers into core business risk.
Ignoring these forces isn’t an option. When organizations widen natural disaster risk assessment to capture secondary perils, they gain the insight needed to protect people, property and performance in an era of relentless extreme weather.
Understanding Why Secondary Perils Are No Longer Secondary
For decades insurers defined secondary perils as weather events too localized or modest to threaten corporate solvency. Think neighborhood flash floods, hillside slides or single-day hailstorms. That label no longer fits. Secondary perils now generate loss tallies large enough to influence enterprise value, shareholder confidence and even credit ratings, so boards are asking risk leaders how they’ll keep pace.
Rising loss activity is the headline driver. Across the United States the acreage consumed by wildfires has increased each decade since the 1980s while real estate development has surged along the wildland-urban interface (WUI) – the transition zone where wilderness meets human development. Guy Carpenter warns that rising wildfire exposure driven by this combination is putting far more insured value directly in harm’s way.
Connecting Climate, Exposure and Loss Growth
Climate shifts, urban expansion, aging infrastructure and supply chain complexity are combining to amplify extreme-weather threats. Warmer oceans and air masses fuel wetter storms, sprawling development places critical facilities and transport corridors in their paths and decades-old drainage or power systems struggle under new loads. Supply chains multiply the impact: when one plant, port or data center fails you can feel the ripple effects across continents.
Guy Carpenter notes that tornado and straight-line wind events “have reached near-historic highs,” while hail losses remain stubbornly elevated, a reality that demands sharper accumulation management and higher retentions for insurers. At the corporate level a single afternoon hailburst can tear through multiple distribution centers, idle production lines and overwhelm your claims team before the skies clear.
Imagine your Midwest facilities network. A localized storm rips through one plant’s roof, topples a critical substation miles away and delays inbound components from a supplier hit by the same system. The direct damage is confined to one county yet the operational and financial shock reverberates through your enterprise, draining inventories, jeopardizing customer commitments and complicating renewal negotiations.
You can see how quickly a “secondary” peril becomes a primary headache. The next step is to track each threat with the same rigor you apply to hurricanes and earthquakes.
Examining the Perils That Are Reshaping Business Risk
Secondary perils rarely strike in isolation. A wildfire that degrades air quality can overlap with flash-flood warnings and hail-laden storms may weaken roofs just before a late-season downpour. Evaluating wildfire, flood, convective storms and landslides together shows how their geographic footprints, supply-chain touchpoints and financial impacts overlap – and why you need an integrated plan.
Assessing Wildfire Risk Beyond the Burn Zone
Wildfire exposure keeps climbing because harsher fire weather meets booming WUI development. Guy Carpenter’s research links decades of increasing burned acreage to both hotter drier conditions and population shifts into fire-prone corridors. Drought, higher temperatures and longer fire seasons turn vegetation into fuel and stretch suppression resources.
Flames aren’t the only threat. Smoke can trigger shelter-in-place orders, ash can clog HVAC systems and power shutoffs meant to prevent ignitions can halt production miles from the fire line. A solid risk assessment accounts for direct damage and the wider performance impacts that follow.
Assessing Flood Risk in a More Volatile Rainfall Environment
Heavier downpours, inadequate drainage and shifting storm tracks are driving flood risk into places once considered safe. The EPA explains that “localized floods happen when rainfall overwhelms the capacity of drainage systems, while riverine floods happen when river flows exceed the capacity of the river channel.” Accurate mapping of both scenarios is essential because either can sever access roads, ruin inventory or short-circuit critical equipment.
Assessing Convective Storm Risk Across Facilities and Supply Chains
Severe convective storms unleash hailstones, tornadoes and straight-line winds with little warning, turning a calm afternoon into a costly scramble. Guy Carpenter points out that tornado and wind events recently reached “near-historic highs” and stresses that uncertainty around year-to-year variability makes accumulation management vital. One five-minute hail burst can shatter skylights, puncture roofs and disable rooftop equipment, leaving a portfolio of warehouses exposed to water intrusion and weeks of shutdown.
A brief but violent derecho in the Midwest proved the point. Multiple plants lost power, a key supplier’s facility suffered roof failure and trucking routes were jammed by debris. Although the storm lasted only hours, downstream orders slipped, overtime costs soared and dozens of claims hit under tightened hail deductibles.
Assessing Landslide Risk as a Cascading Hazard
Landslides rarely appear on corporate risk registers yet their triggers are multiplying. Intense rainfall, wildfire burn scars that de-vegetate slopes and even vibrations from nearby construction can destabilize ground faster than maintenance budgets can keep pace. The Pacific Disaster Center notes that its LHASA integration lets users “map rainfall-triggered landslide hazards,” giving your team timely alerts and richer situational awareness. If you operate mines, pipelines or mountain transport corridors that lead time can mean rerouting product, staging crews or securing stock before slopes give way.
Recognizing how these four threats interact sets the stage for a sharper enterprise-level risk assessment.
Building a More Useful Natural Disaster Risk Assessment
Historical loss runs and single-site inspections capture yesterday’s weather, not tomorrow’s reality. Secondary perils evolve too quickly for backward-looking methods alone. To see the full scale of extreme-weather risk you need an assessment that blends forward-looking hazard science with a 360 degree view of operations.
The EPA’s data on increasing downpours shows how fast baselines can shift. If you rely on old assumptions your next storm could expose costly blind spots.
Some organizations find that following a four-step framework sharpens their natural disaster risk assessment:
Hazard identification
Inventory every peril from wildfire embers to rainfall-triggered landslides. NASA’s LHASA alerts now let users map these slope hazards, providing early warnings that were impossible a decade ago.
Exposure mapping
Overlay hazard footprints on each facility, supplier, transport corridor and critical customer site. Include planned expansions and leased locations so growth strategies don’t outrun resilience measures.
Vulnerability analysis
Quantify how design, age and maintenance affect loss potential. Risk & Insurance, summarizing Swiss Re’s sigma research, reports that homes built or retrofitted to the FORTIFIED standard have seen claims frequency drop up to 70 percent and severity by 40 percent – evidence that targeted hardening works.
Business impact evaluation
Translate physical damage into financial terms – downtime, lost revenue, contingent business interruption and reputational harm. Clear documentation strengthens underwriting discussions and guides capital allocation.
Expanding the View From Assets to Operations
Assets are only one piece of the puzzle. Utilities, transport links, key suppliers, workforce availability and service commitments determine whether damage turns into prolonged disruption. Concentration analysis helps you spot clusters of exposure – like multiple plants drawing from one power grid – before the next storm tests those connections.
Using Better Data to Improve Decisions
Geospatial hazard layers, climate projections, engineering insight and real-time alerts now converge in unified decision platforms. When you marry that intelligence with strong documentation you can right-size deductibles, validate business interruption values and satisfy emerging climate-disclosure rules. With priorities clear it’s time to act – harden sites, train teams and align insurance with real exposure.
Strengthening Resilience Before the Next Event
Resilience isn’t a single retrofit or policy tweak. It blends physical protection, operational readiness and financial planning prioritized around recurring loss patterns, critical processes and recovery time objectives.
Hardening Sites Against Repeating Weather Losses
Risk & Insurance, summarizing Swiss Re’s sigma research, reports that homes retrofitted to the FORTIFIED standard experience much lower claim frequency and severity, proving that impact-resistant roofing, sealed decks, upgraded drainage and defensible space pay off.
Beyond those upgrades elevating equipment, anchoring rooftop units and reinforcing glazing can cut repeat hail, wind and flood damage. Building codes focus on life safety not asset longevity, so meeting code often isn’t enough for sites facing serial extreme weather.
Preparing Teams and Continuity Plans for Faster Response
People make resilience work. Trigger-based alerts, pre-qualified contractors and cross-functional incident teams let you move fast when warnings arrive. Tabletop exercises clarify roles, validate escalation paths and ensure safety, restoration and communication stay in sync. A documented continuity plan slashes downtime, safeguards employees and protects customer commitments when disruption strikes.
Aligning Risk Transfer With Real Exposure
Insurance markets are tightening deductibles, sublimits and exclusions around wildfire, flood and convective storms. Guy Carpenter warns that severe convective storms’ “near-historic highs” already push carriers to raise retentions. Strong exposure data, defensible business interruption values and, when it fits, parametric cover help you secure capacity on fair terms.
Effective resilience demands that physical, operational and financial measures advance together, guided by clear priorities and refreshed after every event cycle.
Turning Insight Into an Ongoing Risk Strategy
Secondary perils shift too quickly for annual reviews. You need a living strategy that pairs updated data with ownership across risk, operations, finance and leadership.
Guy Carpenter stresses that severe convective storms’ “near-historic highs” demand tighter aggregation controls and higher retentions – a reminder that underwriting inputs must refresh as hazards evolve. When your engineering teams, threat analysts and finance leaders share this insight in one workflow you can act before renewal surprises arise.
Here at Sigma7 we’ve seen the power of integration. A tech-forward field-based assessment recently showed one client that two plants and a key supplier sat inside overlapping hail, flood and wildfire zones. The combined findings guided a capital plan that funded roof upgrades, backup power and a parametric hail cover, cutting modeled downtime by 45 percent.
By connecting hazard data to financial metrics you move from weather awareness to measurable resilience.
Make Secondary Perils Part of Your Core Risk Strategy
Wildfire embers, flash floods, hail bursts and slope failures are no longer side notes. They drive insured losses, upend supply chains and test balance sheets. Putting them at the center of your natural disaster risk assessment and extreme-weather planning is now essential.
Ready to see how a holistic data-driven approach can strengthen your resilience? Contact Sigma7 for a tailored risk assessment or resilience consultation.
