Learning Outcomes

By the end of this lesson, learners should be able to:

• Explain the concept of physical climate risks.
• Identify the major physical impacts of climate change.
• Describe how floods, droughts, heat waves, and sea-level rise affect economies and societies.
• Explain the impact of extreme weather events on businesses and infrastructure.
• Assess the financial implications of physical climate risks.

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Introduction

Climate change is causing significant changes in weather patterns and environmental conditions across the globe. Rising global temperatures have increased the frequency and intensity of floods, droughts, heat waves, storms, and rising sea levels. These physical impacts threaten lives, ecosystems, businesses, and national economies.

Physical climate risks refer to the direct impacts of climate change on people, assets, infrastructure, and economic activities. These risks can cause substantial financial losses, disrupt supply chains, damage property, reduce agricultural productivity, and increase insurance costs. Understanding physical climate risks is essential for governments, investors, and businesses seeking to develop effective adaptation strategies and build long-term resilience.

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1. Floods

Floods are among the most common and costly natural disasters associated with climate change. Increased rainfall, stronger storms, and rising sea levels have made flooding more frequent and severe in many regions.

Flooding can destroy homes, roads, bridges, power systems, and agricultural land. Businesses may experience operational disruptions, while governments incur significant costs for disaster response, reconstruction, and recovery.

The economic effects of floods often extend beyond the immediate disaster through business interruptions, reduced productivity, and increased insurance claims.

Impacts of Floods

• Damage to buildings and infrastructure.
• Loss of agricultural production.
• Business interruption.
• Increased insurance costs.
• Population displacement.
• Public health challenges.

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2. Droughts

Droughts occur when prolonged periods of below-average rainfall reduce water availability. Climate change has increased the severity and duration of droughts in many regions, affecting agriculture, energy production, and water supplies.

Water shortages reduce crop yields, threaten food security, and increase production costs for industries dependent on water resources. Hydropower generation may also decline, affecting electricity supply and economic activity.

Governments often invest in water conservation, irrigation systems, and climate-smart agriculture to reduce the impacts of drought.

Consequences of Drought

• Reduced agricultural productivity.
• Water scarcity.
• Increased food prices.
• Energy supply challenges.
• Loss of biodiversity.
• Rural economic decline.

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3. Heat Waves

Heat waves are prolonged periods of unusually high temperatures that can have serious consequences for human health, economic productivity, and infrastructure.

Extreme heat increases energy demand for cooling, reduces labour productivity, and places additional pressure on healthcare systems. High temperatures can also damage roads, railways, and electricity infrastructure while increasing the likelihood of wildfires.

Businesses operating in agriculture, construction, manufacturing, and outdoor services are particularly vulnerable to prolonged heat events.

Effects of Heat Waves

• Increased healthcare costs.
• Lower worker productivity.
• Higher electricity demand.
• Infrastructure damage.
• Increased wildfire risk.
• Reduced crop yields.

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4. Sea-Level Rise

Sea-level rise is caused primarily by the melting of glaciers and polar ice sheets, combined with the thermal expansion of seawater as global temperatures increase.

Rising sea levels threaten coastal cities, ports, tourism facilities, transportation networks, and critical infrastructure. Coastal flooding and erosion can result in significant economic losses and displacement of communities.

Many countries are investing in coastal protection measures such as seawalls, mangrove restoration, and climate-resilient urban planning to reduce these risks.

Risks Associated with Sea-Level Rise

• Coastal flooding.
• Land erosion.
• Saltwater intrusion into freshwater supplies.
• Damage to ports and transport infrastructure.
• Population displacement.
• Loss of coastal ecosystems.

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5. Extreme Weather

Climate change has increased the frequency and intensity of extreme weather events, including hurricanes, cyclones, storms, heavy rainfall, and wildfires.

These events often result in extensive property damage, business interruptions, and economic losses. Supply chains may be disrupted as transportation networks, manufacturing facilities, and communication systems are affected.

Financial institutions also face increased risks due to higher insurance claims, loan defaults, and declining asset values in climate-vulnerable regions.

Examples of extreme weather events include:

• Tropical cyclones.
• Hurricanes.
• Severe storms.
• Wildfires.
• Heavy rainfall.
• Tornadoes.

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6. Infrastructure Impacts

Infrastructure forms the backbone of economic activity, making it highly vulnerable to physical climate risks. Roads, bridges, airports, ports, electricity grids, water systems, and telecommunications networks can all suffer damage from climate-related events.

Climate-resilient infrastructure is increasingly important as governments and investors seek to reduce future repair costs and improve long-term economic stability.

Infrastructure planning now incorporates climate risk assessments, resilient construction standards, and sustainable design principles to improve durability under changing climate conditions.

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Key Takeaways

• Physical climate risks result directly from changes in weather and climate conditions.
• Floods, droughts, heat waves, sea-level rise, and extreme weather events cause significant economic and social impacts.
• Climate-related disasters can damage infrastructure, disrupt business operations, and increase financial losses.
• Climate-resilient infrastructure reduces vulnerability and improves long-term sustainability.
• Understanding physical climate risks helps governments, businesses, and investors develop effective adaptation and resilience strategies.