【世界银行】不可持续的生活：高温对孟加拉国健康和经济的影响-2024_110页_4mb

Summary of "An Unsustainable Life: The Impact of Heat on Health and the Economy of Bangladesh"

Core Content

This report, An Unsustainable Life: The Impact of Heat on Health and the Economy of Bangladesh, examines the growing threat of extreme heat to public health and economic productivity in Bangladesh. It provides a comprehensive analysis of how rising temperatures are affecting physical and mental health conditions, as well as the associated productivity losses. The study is based on two rounds of nationally representative household panel data collected in 2024, covering over 16,000 individuals, and is the first of its kind to quantify these impacts in Bangladesh.

Main Findings

Climate Trends

• Temperature Rise: Between 1980 and 2023, Bangladesh's maximum temperature increased by 1.1°C, and the heat index (which accounts for humidity) rose by 4.5°C.
• Dhaka as a Heat Hotspot: Dhaka, the capital, warmed 1.4°C over the same period, 0.3°C faster than the national average. The heat index in Dhaka increased by 65% more than the national average.
• Urban Heat Island Effect: Rapid urbanization, population growth, and unplanned development have led to the loss of 47% of green space and vegetation in Dhaka between 1989 and 2020, contributing to higher temperatures.

Health Impacts

• Physical Health Conditions:
  • Persistent Cough: The most common heat-related condition, affecting 6.0% of the population in summer vs. 3.3% in winter. Most prevalent among the elderly (age >66 years).
  • Heat Exhaustion: Affecting 2.6% of respondents in summer. Highest among the working-age group (36–65 years) and the elderly (age >66 years).
  • Diarrhea: Occurred in 4.4% of individuals in summer vs. 1.8% in winter. Most common among children under 5 years and women.
• Mental Health Conditions:
  • Depression: Increased from 16.2% in winter to 20.0% in summer.
  • Generalized Anxiety Disorders: Rose from 8.3% to 10.0% in the same period.
  • Emotional Regulation: More challenging during high-temperature days, with significant associations with depression and anxiety.

Productivity Loss

• Workdays Lost: The report estimates that 25 million workdays were lost in 2024 due to heat-induced health conditions.
• Economic Impact: The economic cost of productivity loss was calculated to be between $1.33 billion and $1.78 billion, or 0.3–0.4% of GDP.
• Temperature Thresholds:
  • 35°C to 37°C: Increased productivity loss by 1.2–1.9% per month compared to days below 30°C.
  • Above 37°C: Significantly higher productivity loss, emphasizing the need for urgent interventions.

Key Recommendations

To address the growing health and economic risks posed by extreme heat, the report proposes the following strategies:

1. Enhance National Preparedness: Strengthen multisectoral coordination to better manage heat waves.
2. Strengthen Health Sector Response: Improve capacity to handle heat-related illnesses and reduce mortality.
3. Develop Preventive Measures: Use advanced technology to mitigate the health impacts of heat.
4. Improve Data Collection: Gather granular and accurate weather data to inform effective decision-making.
5. Seek International Support: Access global financing and expertise to combat the effects of global warming on Bangladesh.

Conclusion

Bangladesh is experiencing unprecedented warming, with the heat index doubling over the past 43 years. This has led to severe health and economic consequences, particularly for vulnerable groups such as the elderly, children, and women. The report underscores the urgent need for comprehensive and adaptive strategies to address climate change impacts on health and productivity. It also highlights the importance of leveraging both local and global insights to build a more resilient future.

References

• Ministry of Environment, Forest, and Climate Change. 2022. Mujib Climate Prosperity Plan 2022–2041: From Vulnerability to Resilience to Prosperity.
• World Meteorological Organization (WMO). 2024. State of the Global Climate 2023.
• Jay, et al. 2021. Heat waves have caused more deaths than other natural disasters.
• Lancet. 2018. Heat-related health impacts in developing countries.
• Burkart, et al. 2021. Vulnerability of South and Southeast Asian countries to heat.
• Zachariah, et al. 2023. Dhaka as a global urban heat hotspot.
• Nawar, et al. 2022. Loss of green space in Dhaka between 1989 and 2020.