Heatwaves and Climate Change Impacts
Environment & Ecology
- PYQs8
- Articles1
Background
UPSC examines environmental hazards, disaster management, public health challenges, and the direct impacts of climate change. Heatwaves serve as a critical case study for understanding these interconnected issues, requiring policy responses for mitigation and adaptation.
Heatwaves are periods of abnormally high temperatures that pose significant risks to human health, infrastructure, and ecosystems. Their increasing frequency, intensity, and duration globally are strongly linked to anthropogenic climate change, which alters atmospheric circulation patterns and raises baseline temperatures, making extreme heat events more likely and severe.
Facts & tables
- Definition
- Prolonged periods of excessively hot weather, often with limited nighttime relief.
- Impacts
- Increased mortality (especially vulnerable populations), wildfires, disruption of power generation, damage to infrastructure, and overwhelmed healthcare systems.
- Causation
- Scientific consensus links current extreme heat events to human-caused climate change, making them 'virtually impossible' without it.
- Vulnerability
- Elderly, children, and those without adequate cooling are particularly susceptible to heat-related illnesses and fatalities.
| Type | Reference |
|---|---|
| Conceptual area | Climate Change Impacts |
| Conceptual area | Disaster Management |
| Conceptual area | Public Health |
Prelims angle
Prelims angle: Multi-statement analysis
Prelims angle: Conceptual understanding
- Defined as prolonged periods of abnormally high temperatures.
- Directly linked to anthropogenic climate change, making them more frequent and intense.
- Major impacts include excess mortality, wildfires, and infrastructure disruption.
- Vulnerable populations (elderly, children) are at highest risk.
- Requires robust disaster management, public health preparedness, and climate mitigation efforts.
| Year | Framing tags |
|---|---|
| 2026 | Multi-statement analysis, Conceptual understanding |
| 2025 | Factual recall, Institutional roles and functions |
| 2025 | Multi-statement analysis, Conceptual understanding |
| 2025 | Multi-statement analysis, Factual recall |
| 2023 | Statement-based questions, Conceptual understanding |
| 2022 | Multi-statement analysis, Factual recall |
| 2020 | Multi-statement analysis, Factual recall |
| 2016 | Policy measures, Purpose or function of a policy tool |
Timeline
-
Climate Change Impacts
Conceptual area
-
Disaster Management
Conceptual area
-
Public Health
Conceptual area
-
Prelims 2016
Policy measures, Purpose or function of a policy tool
-
Prelims 2020
Multi-statement analysis, Factual recall
-
Prelims 2022
Multi-statement analysis, Factual recall
-
Prelims 2023
Statement-based questions, Conceptual understanding
-
Prelims 2025
Factual recall, Institutional roles and functions
-
Prelims 2025
Multi-statement analysis, Conceptual understanding
-
Prelims 2025
Multi-statement analysis, Factual recall
-
Prelims 2026
Multi-statement analysis, Conceptual understanding
-
Italy and Balkans endure heatwave, U.S. also faces soaring temperatures
Heatwaves are extreme weather events with severe health and infrastructure impacts, whose increasing occurrence and intensity are directly attributable to human-induced climate change.
See also
Past papers
2016–2026 · 8 questions
In the news
Italy and Balkans endure heatwave, U.S. also faces soaring temperatures
Heatwaves are extreme weather events with severe health and infrastructure impacts, whose increasing occurrence and intensity are directly attributable to human-induced climate change.
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:
1. "The Climate Group" is an international non-profit organization that drives climate action by building large networks and running them.
2. The International Energy Agency in partnership with the Climate Group launched a global initiative "EP100".
3. EP100 brings together leading companies committed to driving innovation in energy efficiency and increasing competitiveness while delivering on emission reduction goals.
4. Some Indian companies are members of EP100.
5. The International Energy Agency is the Secretariat to the "Under2 Coalition".
Which of the statements given above are correct?
Statement 1 is correct. The CLIMATE GROUP is an international non-profit organization founded in 2003, with offices in London, New York, New Delhi, Amsterdam, and Beijing. Its mission is to drive rapid climate action. This group builds and runs networks. Statement 2 is incorrect. EP100 is a global initiative led by The Climate Group and the Alliance to Save Energy (not by the International Energy Agency). Statement 3 is correct. The Climate Group's global EP100 initiative brings together a growing cohort of energy-smart companies committed to improving their energy productivity and reducing greenhouse gas emissions. By incorporating ambitious energy targets into their business strategies, leading companies are fostering innovation in energy efficiency, enhancing competitiveness, and achieving emissions reduction goals. Statement 4 is correct. EP100 has a global reach, with member companies operating in over 130 markets worldwide. India's Mahindra Group is among the frontrunners in the ongoing efforts to decrease energy consumption and carbon dioxide emissions by transitioning to renewable energy sources. Statement 5 is incorrect. The Climate Group serves as the Secretariat for the Under2 Coalition and collaborates with governments to expedite climate action through four main workstreams - Pathways, - Policy Action, - Transparency, and - Diplomacy.
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
Consider the following statements with reference to India's response to climate change :
I. India's Long-Term Low Emission Development Strategy (LT-LEDS) is a crucial tool for achieving net-zero emissions by 2070.
II. India's 4th Biennial Update Report (BUR-4) submitted in December, 2024 recorded around 8% decrease in Greenhouse gas emissions in 2020 over 2019.
III. Climate-resilient development necessarily depends on quick and short-term achievement of emission reduction targets.
Which of the following relationships among the above statements is/are correct ?
1. Statement I is empirically supported by statement II.
2. Statement III contradicts the approach implicit in statement I.
3. Statement I and statement III together establish the premise of long-term sustainability.
Select the answer using the code given below :
Statement I is Correct: India's Long-Term Low Emission Development Strategy (LT-LEDS) is indeed a crucial tool for achieving net-zero emissions by 2070. It outlines the strategic framework necessary for sectoral transitions in energy, transport, industry, and forestry to meet this long-term goal. Statement II is Incorrect: While India's 4th Biennial Update Report (BUR-4) does record an approximately 8% decrease in greenhouse gas emissions in 2020 compared to 2019, this decrease is attributed to the economic slowdown and lockdowns during the COVID-19 pandemic, not to structural or strategic efforts towards long-term emission reductions. Therefore, it does not empirically support the strategic framework of LT-LEDS. Statement III is Correct: The IPCC emphasizes that climate-resilient development depends on rapid, deep, and immediate emission reductions in the short term. This approach can be seen as contradicting the long-term focus of strategies like LT-LEDS if they do not also incorporate aggressive short-term actions. Therefore, the correct relationship is that Statement III contradicts the approach implicit in Statement I, making option B correct.
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.
Show 3 more PYQs
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.
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: 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.