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Heatwaves and Climate Change Impacts

Environment & Ecology

  • PYQs8
  • Articles1
I

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.

II

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.
Static syllabus anchors
Type Reference
Conceptual area Climate Change Impacts
Conceptual area Disaster Management
Conceptual area Public Health
III

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.
High-confidence PYQ links
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

  1. Climate Change Impacts

    Conceptual area

  2. Disaster Management

    Conceptual area

  3. Public Health

    Conceptual area

  4. Prelims 2016

    Policy measures, Purpose or function of a policy tool

  5. Prelims 2020

    Multi-statement analysis, Factual recall

  6. Prelims 2022

    Multi-statement analysis, Factual recall

  7. Prelims 2023

    Statement-based questions, Conceptual understanding

  8. Prelims 2025

    Factual recall, Institutional roles and functions

  9. Prelims 2025

    Multi-statement analysis, Conceptual understanding

  10. Prelims 2025

    Multi-statement analysis, Factual recall

  11. Prelims 2026

    Multi-statement analysis, Conceptual understanding

  12. 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

Heatwaves and Climate Change Impacts
Hydro-meteorological Disasters

Past papers

In the news

Try these PYQs

UPSC Prelims 2025 medium Environment & Ecology Open full page

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.

UPSC Prelims 2022 medium Environment & Ecology Open full page

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?

UPSC Prelims 2025 hard Environment & Ecology Open full page

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?

UPSC Prelims 2026 hard Environment & Ecology Open full page

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 :

UPSC Prelims 2020 easy International Relations Open full page

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?

Show 3 more PYQs
UPSC Prelims 2016 medium Environment & Ecology Open full page

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

UPSC Prelims 2025 easy Environment & Ecology Open full page

Which organization has enacted the Nature Restoration Law (NRL) to tackle climate change and biodiversity loss?

UPSC Prelims 2023 hard Environment & Ecology Open full page

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?