Climate hazards are reshaping how organizations think about risk. From extreme heat waves disrupting operations to floods damaging infrastructure, understanding what climate hazards are and how they differ from climate risk is essential for effective risk management. This guide covers the definition, provides 12 real-world examples, and explains how organizations assess their exposure.
What Is a Climate Hazard?
A climate hazard is a physical event or trend related to climate that has the potential to cause harm to people, property, infrastructure, or ecosystems. According to the Intergovernmental Panel on Climate Change (IPCC), climate hazards include both sudden events and gradual shifts in climate patterns.
Climate hazards fall into two categories:
- Acute hazards: Sudden, event-driven occurrences like hurricanes, floods, or heat waves
- Chronic hazards: Gradual, long-term shifts like rising sea levels, changing precipitation patterns, or increasing average temperatures
The key characteristic of any climate hazard is its potential to cause damage. A heat wave in an unpopulated desert is still a hazard, but its impact depends on whether people, assets, or operations are exposed to it.
Climate Hazard vs Climate Risk: What’s the Difference?
Many people use “climate hazard” and “climate risk” interchangeably, but they represent different concepts in the climate risk management framework.
Climate hazard refers to the physical event itself: the flood, the drought, the heat wave.
Climate risk is what happens when that hazard intersects with exposure and vulnerability:
Climate Risk = Hazard × Exposure × Vulnerability
For example, a severe drought (hazard) affecting a region where your suppliers operate (exposure) with limited water infrastructure (vulnerability) creates significant climate risk for your supply chain.
This distinction matters because organizations can reduce risk by addressing any of the three components. You cannot stop a drought from occurring, but you can reduce exposure by diversifying supplier locations or reduce vulnerability by requiring suppliers to implement water conservation measures. Understanding this relationship is central to climate vulnerability assessments.
12 Examples of Climate Hazards
Organizations conducting physical climate risk assessments typically evaluate exposure across multiple climate hazards. Here are 12 physical hazards commonly assessed, organized by category:
Temperature Hazards
- Heat Wave: Prolonged periods of abnormally high temperatures that can disrupt operations, stress workers, and damage equipment
- Cold Stress: Extended periods of extreme cold affecting worker safety, energy costs, and infrastructure
- Temperature Change: Long-term shifts in average temperatures affecting agricultural yields, energy demand, and operational planning
Precipitation Hazards
- Drought: Extended periods of below-normal precipitation affecting water availability, agriculture, and industrial processes
- Extreme Rainfall: Intense precipitation events causing flash flooding, erosion, and infrastructure damage
- Precipitation Change: Long-term shifts in rainfall patterns affecting water resources and land use
Compound Hazards
- Wildfire: Uncontrolled fires fueled by dry conditions, heat, and wind, threatening facilities and supply chains
- Landslide: Ground movement triggered by rainfall, earthquakes, or erosion, damaging infrastructure and blocking transportation
- Severe Storm: Intense weather events including hurricanes, cyclones, and tornadoes causing widespread damage
Hydrological Hazards
- River Flood: Overflow of rivers and streams due to heavy rainfall or snowmelt
- Sea Level Rise: Gradual increase in ocean levels threatening coastal facilities and infrastructure
- Water Stress: Imbalance between water demand and available supply in a region, measured by the U.S. Climate Resilience Toolkit and tools like WRI Aqueduct
What Causes Climate Hazards?
Climate hazards result from both natural climate variability and human-induced climate change. While extreme weather has always occurred, the International Energy Agency and other bodies confirm that climate change is increasing the frequency and intensity of many hazards.
Key drivers include:
- Greenhouse gas emissions: Rising CO2 and methane trap heat, warming the atmosphere and oceans
- Ocean warming: Warmer oceans fuel stronger storms and contribute to sea level rise
- Changing atmospheric patterns: Altered jet streams and pressure systems shift precipitation patterns
- Feedback loops: Melting ice reduces reflectivity, accelerating warming; thawing permafrost releases additional methane
Climate scientists use emissions scenarios (SSP2-4.5 for moderate emissions, SSP5-8.5 for high emissions) to project how climate hazards will evolve through 2030, 2040, and 2050. These projections help organizations understand not just current hazard exposure, but how it may change over time.
How Organizations Assess Climate Hazard Exposure
Assessing climate hazard exposure involves three steps:
1. Identify locations at risk: Map all physical assets, facilities, and supplier locations that could be affected by climate hazards. This requires accurate geocoding and location validation.
2. Screen for multiple hazards: Evaluate each location against all relevant climate hazards. A coastal facility may face sea level rise and severe storms, while an inland facility may face heat waves and water stress. Comprehensive tools assess all 12 hazards simultaneously rather than focusing on just one.
3. Apply scenario analysis: Project how hazard exposure changes under different climate scenarios and time horizons. A location with moderate flood risk today may face high risk by 2040 under SSP5-8.5.
The value of systematic screening becomes clear when you find what you were not looking for. We recently screened a retail supply chain across their upstream and downstream partner network. The assessment revealed that four of their critical distribution points sat in flood risk zones with recent flooding incidents. These were not company-owned facilities, but partner locations. The workforce deployed there was not on the company’s payroll. Yet a flood disrupting those nodes would cascade into financial losses and reputational exposure all the same. Partner-level hazard exposure is still your exposure.
For organizations needing to assess climate hazard exposure across multiple locations, platforms like Continuuiti’s Climate Risk tool provide instant assessment of all 12 physical hazards, with projections across multiple scenarios and time horizons. This enables systematic screening at a fraction of traditional consulting costs.
Frequently Asked Questions
What is a climate hazard?
A climate hazard is a physical event or trend related to climate that has the potential to cause harm to people, property, infrastructure, or ecosystems. Examples include heat waves, floods, droughts, and sea level rise. Climate hazards can be acute (sudden events) or chronic (gradual changes).
What are examples of climate hazards?
Common climate hazards include: heat waves, cold stress, temperature change, drought, extreme rainfall, precipitation change, wildfire, landslide, severe storms, river floods, sea level rise, and water stress. These are typically grouped into temperature, precipitation, compound, and hydrological categories.
What is the difference between a climate hazard and climate risk?
A climate hazard is the physical event itself (like a flood or heat wave), while climate risk is the potential for loss when that hazard intersects with exposure and vulnerability. The formula is: Climate Risk = Hazard x Exposure x Vulnerability. You cannot eliminate hazards, but you can reduce risk by managing exposure and vulnerability.
What causes climate hazards?
Climate hazards result from natural climate variability and human-induced climate change. Greenhouse gas emissions warm the atmosphere and oceans, increasing the frequency and intensity of extreme weather events. Key drivers include ocean warming, changing atmospheric patterns, and feedback loops like melting ice and thawing permafrost.
How do organizations assess climate hazard exposure?
Organizations assess climate hazard exposure by: (1) identifying all locations at risk including facilities and suppliers, (2) screening each location against multiple hazards simultaneously, and (3) applying scenario analysis to project how exposure changes over time under different climate pathways.
Climate hazards are physical events that exist regardless of whether they affect anyone. Climate risk emerges when those hazards intersect with the locations, assets, and operations that matter to your organization. By understanding the 12 physical climate hazards and how to assess exposure across multiple locations, organizations can build resilience into their operations and meet disclosure requirements under frameworks like TCFD.
