Heatwaves and Public Health Impacts
Environment & Ecology
- PYQs8
- Articles1
Background
UPSC examines the socio-economic impacts of climate change, public health challenges, disaster management, and the vulnerability of informal sector workers. Heatwaves represent a critical intersection of these themes, requiring policy responses and adaptation strategies.
Heatwaves, defined as prolonged periods of abnormally high temperatures, are a significant climate-related public health threat, leading to heatstroke, dehydration, and increased mortality, particularly among vulnerable populations like outdoor workers and the elderly. They are exacerbated by climate change and urbanisation.
Facts & tables
- Impacts
- Cause heatstroke, exhaustion, dizziness, and can be fatal, especially for individuals engaged in outdoor physical labor.
- Vulnerable Groups
- Daily wage laborers, street vendors, construction workers, sanitation staff, and traffic police are disproportionately affected due to prolonged outdoor exposure.
- Reporting Challenges
- Significant discrepancies exist between suspected and officially confirmed heatstroke deaths, complicated by lengthy medical and administrative verification processes.
- Exacerbating Factors
- Climate change increases frequency and intensity of heatwaves; urban heat island effect intensifies heat stress in cities.
| Type | Reference |
|---|---|
| Conceptual area | Public Health |
| Conceptual area | Disaster Management |
| Body | Role |
|---|---|
| India Meteorological Department (IMD) | Issues warnings |
| National Programme on Climate Change and Human Health | Issues guidelines |
| Telangana State Disaster Management Authority | Monitors mitigation measures |
| National Crime Records Bureau (NCRB) | Collects data on deaths |
Prelims angle
Prelims angle: Multi-statement analysis
Prelims angle: Conceptual understanding
- Heatwaves are prolonged periods of extreme heat, intensified by climate change.
- Major public health threat, causing heatstroke, dehydration, and mortality.
- Disproportionately affects outdoor workers and informal sector.
- Challenges in accurate data collection and official confirmation of heatstroke deaths.
- Requires comprehensive Heatwave Action Plans, early warnings, and public health preparedness.
| Year | Framing tags |
|---|---|
| 2025 | Multi-statement analysis, Conceptual understanding |
| 2025 | Multi-statement analysis, Conceptual understanding |
| 2025 | Statement-based questions, Conceptual understanding |
| 2025 | Factual recall, Institutional roles and functions |
| 2025 | Multi-statement analysis, Factual recall |
| 2023 | Statement-based questions, Conceptual understanding |
| 2020 | Multi-statement analysis, Factual recall |
| 2016 | Policy measures, Purpose or function of a policy tool |
Timeline
-
Public Health
Conceptual area
-
Disaster Management
Conceptual area
-
Prelims 2016
Policy measures, Purpose or function of a policy tool
-
Prelims 2020
Multi-statement analysis, Factual recall
-
Prelims 2023
Statement-based questions, Conceptual understanding
-
Prelims 2025
Multi-statement analysis, Conceptual understanding
-
Prelims 2025
Multi-statement analysis, Conceptual understanding
-
Prelims 2025
Statement-based questions, Conceptual understanding
-
Prelims 2025
Factual recall, Institutional roles and functions
-
Prelims 2025
Multi-statement analysis, Factual recall
-
A heat crisis in Telangana that burns beyond the thermometer
Heatwaves are a growing public health crisis driven by climate change, severely impacting outdoor workers and posing challenges for accurate reporting and effective mitigation.
See also
Past papers
2016–2025 · 8 questions
In the news
A heat crisis in Telangana that burns beyond the thermometer
Heatwaves are a growing public health crisis driven by climate change, severely impacting outdoor workers and posing challenges for accurate reporting and effective mitigation.
Try these PYQs
The World Bank warned that India could become one of the first places where wet-bulb temperatures routinely exceed 35 °C. Which of the following statements best reflect(s) the implication of the above‐said report?
I. Peninsular India will most likely suffer from flooding, tropical cyclones and droughts.
II. The survival of animals including humans will be affected as shedding of their body heat through perspiration becomes difficult.
Select the correct answer using the code given below.
Wet-bulb temperature combines heat and humidity. When it exceeds 35°C, the human body can no longer cool itself through sweating, posing a serious threat to survival. ❌ Statement I: Incorrect
* Though flooding, cyclones, and droughts are valid climate threats, they are not directly related to the World Bank's warning about wet-bulb temperatures. ✅ Statement II: Correct
* When wet-bulb temperatures cross 35°C, the body cannot release heat, making it fatal for humans and animals.
Consider the following statements:
Statement I:
At the 28th United Nations Climate Change Conference (COP28), India refrained from signing the “Declaration on Climate and Health”.
Statement II:
The COP28 Declaration on Climate and Health is a binding declaration; and if signed, it becomes mandatory to decarbonize health sector.
Statement III:
If India’s health sector is decarbonized, the resilience of its health-care system may be compromised.
Which one of the following is correct in respect of the above statements?
At COP28, India chose not to sign the “Declaration on Climate and Health,” and this decision can be understood by analyzing the nature of the declaration and India’s concerns. ✅ Statement I: Correct. India did not sign the COP28 Declaration on Climate and Health, unlike over 120 other countries. ❌ Statement II: Incorrect. The declaration is not legally binding; it is a voluntary political commitment. Signing it does not legally mandate countries to decarbonize their health sectors immediately. ✅Statement III: Correct. India’s concern is that rapid decarbonization of its health sector could compromise the resilience and accessibility of healthcare services, given current developmental challenges and resource constraints. Therefore, only Statement III correctly explains Statement I, while Statement II is factually wrong about the binding nature of the declaration.
Consider the following pairs
| International Agreement | Set-up Subject |
|--------------------------|----------------------------|
| 1. Alma-Ata Declaration | Healthcare of the people |
| 2. Hague Convention | Biological and chemical weapons |
| 3. Talanoa Dialogue | Global climate change |
| 4. Under2 Coalition | Child rights |
Which of the pairs given above is/are correctly matched?
Pair 1 is correctly matched. Alma Ata Declaration: The Declaration of Alma-Ata was adopted at the International Conference on Primary Health Care, Almaty, Kazakhstan, 612 September 1978. It expressed the need for urgent action by all governments, all health and development workers, and the world community to protect and promote the health of all people. Pair 2 is not correctly matched. Hague Convention: The Hague Convention on the Civil Aspects of International Child Abduction or Hague Abduction Convention is a multilateral treaty developed by the Hague Conference on Private International Law that provides an expeditious method to return a child internationally abducted by a parent from one member country to another. Pair 3 is correctly matched. The Talanoa Dialogue is a process designed to help countries implement and enhance their Nationally Determined Contributions by 2020. The Dialogue was mandated by the Parties to the United Nations Framework Convention for Climate Change to take stock of the collective global efforts to reduce the emissions of greenhouse gases, in line with the goals of the Paris Agreement. Pair 4 is not correctly matched. The Under2 Coalition is a global community of state and regional governments committed to ambitious climate action in line with the Paris Agreement. The coalition brings together more than 220 governments that represent over 1.3 billion people and 43% of the global economy. Signatories commit to keeping global temperature rises to well below 2C with efforts to reach 1.5C.
Consider the following statements:
I. Without the atmosphere, temperature would be well below freezing point everywhere on the Earth's surface.
II. Heat absorbed and trapped by the atmosphere maintains our planet's average temperature.
III. Atmosphere's gases, like carbon dioxide, are particularly good at absorbing and trapping radiation.
Which of the statements given above are correct?
Statement I is correct: Without the atmosphere to trap heat, the Earth’s surface temperature would drop to well below freezing, making it too cold to support life as we know it.
In statement 1 though it's an extreme statement but from UPSC CSE point of view it's generally considered true. Statement II is correct: The atmosphere absorbs and retains heat (a natural greenhouse effect), which helps maintain the Earth’s average temperature within a habitable range. Statement III is correct: Gases such as carbon dioxide, methane, and water vapor are particularly effective at absorbing and trapping infrared radiation, helping to warm the planet.
Which of the following best describes the aim of ‘Green India Mission’ of the Government of India?
1. Incorporating environment benefits and costs into the Union and State Budgets thereby implementing the ‘green accounting’.
2. Launching the second green revolution to enhance agriculture output so as to ensure food security to one and all in the future.
3. Restoring and enhancing forest cover and responding to climate change by a combination of adaptation and mitigation measures.
Select the correct answer using the code given below
The National Mission for Green India (GIM) is one of the eight Missions outlined under the National Action Plan on Climate Change (NAPCC). Mission Goals:
- To increase forest/tree cover to the extent of 5 million hectares (mha) and improve quality of forest/tree cover on another 5 mha of forest/non-forest lands;
- To improve/enhance ecosystem services like carbon sequestration and storage (in forests and other ecosystems), hydrological services and biodiversity; along with provisioning services like fuel, fodder, and timber and non-timber forest produces (NTFPs); and
- To increase forest-based livelihood income of about 3 million households.
Show 3 more PYQs
Consider the following statements:
Statement-I: Carbon markets are likely to be one of the most widespread tools in the fight against climate change.
Statement-II: Carbon markets transfer resources from the private sector to the State.
Which one of the following is correct in respect of the above statements?
* Carbon markets, which include mechanisms like cap-and-trade systems and carbon offsets, are increasingly being used as a tool to incentivize emissions reductions and help in the fight against climate change. So, statement 1 is true. * Carbon markets typically work by transferring resources from emitters (usually in the private sector) to entities that can reduce or remove greenhouse gas emissions, which can be either private entities or the government. So, statement 2 can also be true.
Which organization has enacted the Nature Restoration Law (NRL) to tackle climate change and biodiversity loss?
✅ A. The European Union:
The Nature Restoration Law (NRL) is an EU legislative initiative adopted in 2024. It sets binding targets to restore ecosystems, fight climate change, and protect biodiversity across EU member states. ❌ B. The World Bank:
An international financial institution providing loans and grants; it does not enact laws like the NRL. ❌ C. OECD:
An organization promoting economic cooperation and policy coordination; it does not enact binding environmental laws such as the NRL. ❌ D. FAO:
A UN agency focused on hunger and agriculture; it does not enact regional laws like the NRL.
Consider the following statements:
Statement I:
Article 6 of the Paris Agreement on climate change is frequently discussed in global discussions on sustainable development and climate change.
Statement II:
Article 6 of the Paris Agreement on climate change sets out the principles of carbon markets.
Statement III:
Article 6 of the Paris Agreement on climate change intends to promote inter-country non-market strategies to reach their climate targets.
Which one of the following is correct in respect of the above statements?
Article 6 of the Paris Agreement is crucial as it outlines international cooperation through both carbon markets and non-market approaches to help countries meet climate goals. ✅ Statement I is correct:
* Article 6 is widely discussed because it enables cooperation through market and non-market means to fight climate change. ✅ Statement II is correct:
* It defines rules for carbon markets, including carbon trading and credit mechanisms. ✅ Statement III is correct:
* It also promotes non-market tools like technology transfer and capacity building to reach climate targets. So, the correct answer is: A