Key Details
Theme | What the Report Highlights | Why It Matters |
|---|---|---|
Heat as a Development Risk | Extreme heat now affects health, labour, agriculture, infrastructure, ecosystems and economic growth simultaneously. | Heat requires long-term development planning rather than seasonal emergency response. |
Economic & Labour Impacts | Heat stress is reducing productivity, increasing occupational risks and raising economic losses across multiple sectors. | Heat adaptation is becoming an economic competitiveness and employment priority. |
Heat Governance | Recommends National Heat Action Plans supported by institutional coordination, health preparedness and early warning systems. | Moves heat management from fragmented disaster response to integrated governance. |
Urban Resilience | Calls for cool roofs, urban greening, passive cooling, reflective materials and climate-resilient infrastructure. | Cities can reduce Urban Heat Island effects while lowering cooling demand. |
Financing Adaptation | Promotes blended finance, municipal pooled financing, resilience bonds and parametric insurance. | Long-term heat adaptation requires financing beyond conventional public expenditure. |
India’s Experience | Highlights Ahmedabad and Ferozepur Heat Action Plans alongside municipal finance and climate-risk insurance. | Demonstrates scalable governance models for other countries in the region. |
Extreme Heat Has Become a Long-Term Development Challenge
The ADB argues that extreme heat is no longer a seasonal weather hazard but a systemic development challengeaffecting public health, labour markets, food systems, urban infrastructure, ecosystems and economic growth simultaneously. As temperatures continue to rise across Southeast Asia, heat is becoming embedded within everyday governance rather than remaining an episodic disaster management issue.
The report notes that 2024 was the hottest year on record, with global temperatures reaching 1.45–1.60°C above pre-industrial levels, while annual temperatures could approach 1.9°C above pre-industrial levels by 2028. Across Southeast Asia, average temperatures have already increased by 0.14–0.20°C per decade since the 1960s, making heatwaves more frequent, prolonged and intense.
The consequences extend well beyond health. Around 2.4 billion workers—70% of the global workforce—are exposed to excessive heat, while heat stress could reduce global labour productivity by 2.2%, equivalent to nearly 80 million full-time jobs, with annual economic losses projected to reach US$2.4 trillion. Productivity begins declining once temperatures exceed 24–26°C and can fall by almost 50% at 33–34°C, highlighting why heat is increasingly becoming a labour and economic policy concern.
The Report Calls for a Shift from Heat Response to Heat Governance
Rather than relying primarily on emergency responses during heatwaves, the report proposes treating heat as a permanent governance challenge that requires institutional coordination across sectors.
Using Thailand as a case study, ADB recommends a National Heat Action Plan built around six pillars: governance, early warning systems, public health preparedness, urban heat management, community resilience and public awareness. The report argues that heat resilience should be integrated into urban planning, infrastructure design, healthcare systems and development policy rather than managed solely through disaster response mechanisms.
Urban adaptation measures include cool roofs, urban greening, reflective materials, passive cooling, water-sensitive planning and heat-resilient infrastructure, all aimed at reducing Urban Heat Island effects while lowering energy demand for cooling.
India’s Experience Demonstrates Practical Models for Heat Governance
ADB identifies India as an important source of practical experience for institutionalising heat adaptation.
The report highlights Ahmedabad’s Heat Action Plan, one of the world’s earliest city-level heat governance frameworks, which combines early warning systems, public awareness campaigns, health preparedness and inter-agency coordination. Ahmedabad’s cool roof programme, covering around 3,000 low-income households, is presented as an example of a scalable and relatively low-cost urban adaptation measure.
The report also highlights the Ferozepur District Heat Action Plan (2024), which establishes temperature-based heat thresholds, departmental preparedness protocols, public advisories and coordinated district-level responses financed through national, state and local government resources.
Beyond governance, ADB cites municipal pooled financing as a mechanism for financing urban cooling infrastructure and highlights India’s Women’s Climate Shock Insurance and Livelihoods Initiative together with weather-indexed crop insurance as examples of parametric insurance that can provide rapid financial support to vulnerable workers and farmers following extreme heat events.
Financing Will Determine the Success of Heat Adaptation
ADB concludes that adaptation needs across Southeast Asia substantially exceed available public resources. Thailand alone is estimated to require US$22–28 billion annually in climate investments between 2030 and 2050, leaving a sizeable financing gap.
To bridge this gap, the report recommends expanding blended finance, municipal pooled financing, resilience bonds, sustainability-linked finance and parametric insurance, enabling governments to scale investments in cooling infrastructure, climate-resilient cities and long-term Heat Action Plans while reducing fiscal pressures.
What is a Heat Action Plan?
A Heat Action Plan (HAP) is a coordinated policy framework that helps governments prepare for, respond to and reduce the impacts of extreme heat. It typically combines early warning systems, public health preparedness, institutional coordination, urban planning, community awareness and targeted measures for vulnerable populations to reduce heat-related mortality, protect livelihoods and improve long-term climate resilience.
Policy Relevance
Reinforces the need to strengthen India’s Heat Action Plans by moving beyond emergency response towards integrated climate governance linked to public health, urban planning and infrastructure policy.
Supports the expansion of city- and district-level Heat Action Plans, building on the Ahmedabad and Ferozepur models highlighted by ADB.
Highlights the importance of introducing occupational heat safety measures, including work-rest schedules, hydration, shade infrastructure and targeted protection for outdoor workers.
Strengthens the case for integrating cool roofs, urban greening, passive cooling and heat-resilient infrastructure into programmes such as Smart Cities Mission, AMRUT and affordable housing initiatives.
Encourages governments to mobilise blended finance, municipal pooled financing, resilience bonds and parametric insurance to fund long-term heat adaptation where public resources remain constrained.
Demonstrates how locally led governance, supported by institutional coordination and innovative financing, can improve resilience to one of the fastest-growing climate risks facing cities and communities.
Follow the Full Report Here: The Increasing Impacts of Heat in Thailand and Southeast Asia: Challenges and Emerging Solutions