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News 16 of 25

Urban Heat Islands Rise 2-10°C in Indian Cities, Core Heatwave Zone Covers 30% Land Area

EnvironmentPolitySocial IssuesHIGH
Target:UPSC GS-IIIMPSCTeachingSSC GAPrelims HighMains High
29 May 2026
~2 min
Source: The Hindu
Key Data:48° Celsius (Sri Ganganagar)2°C to 10°C (UHI difference)30% (Core Heatwave Zone land area)0.55 days/decade (duration increase)0.1 days/decade (frequency increase)8 percentage points (Delhi humidity rise)
Bodies:India Meteorological Department (IMD)World Meteorological Organization (WMO)
Practice MCQs from today's news ▸
What This Article Covers

1.Urban heat islands in Indian cities are 2°C to 10°C hotter than rural areas due to concrete, asphalt, reduced tree cover, and waste heat from air-conditioners.

2.India's Core Heatwave Zone (central, northwestern, eastern coastal regions) covers 30% of land area, with heatwave duration increasing by 0.55 days per decade since 1961.

3.The primary solution is not more ACs but enforcing existing labour laws that mandate stopping outdoor work at dangerous heat thresholds, alongside urban planning for reflective materials and green cover.

The Big Picture
Prelims · HighMains · High

India's urban heat island effect, exacerbated by concrete, asphalt, and loss of green cover, is making cities 2-10°C hotter than surrounding rural areas. This, combined with a 0.55-day-per-decade increase in heatwave duration, creates lethal conditions for outdoor workers. The article calls for urgent urban design reforms and enforcement of existing labour laws to manage heat risks, rather than a reliance on air-conditioning which worsens the problem.

Exam Lens

Quick Exam Facts From News

Urban Heat Island Temp Difference2°C to 10°C hotter
Core Heatwave Zone Coverage30% of India's land area
Heatwave Duration Increase (per decade)0.55 days
Heatwave Frequency Increase (per decade)0.1 days
Delhi Humidity Rise (2015-19 vs 2020-24)8 percentage points

1-Minute Revision

  • ›Urban Heat Island Temp Difference: 2°C to 10°C hotter
  • ›Core Heatwave Zone Coverage: 30% of India's land area
  • ›Target this Data: Core Heatwave Zone covers 30% of India's land area.
  • ›Target this Nodal Body: India Meteorological Department (IMD) for heatwave data.
  • ›Target this Data: Urban heat island temperature difference is 2°C to 10°C.

Mastered this topic? Test your knowledge with a full MCQ quiz.

Practice exam-style questions, track your score, and strengthen your recall.

Q1Static LinkageEasy

Which government department is responsible for monitoring heatwaves and providing related data in India?

Q2Statement-basedMedium

Consider the following statements regarding heat management challenges in India as discussed in the article:

1. The Core Heatwave Zone, as per IMD, covers about 30% of India's total land area.

2. The frequency of heatwave spells in this zone has decreased by 0.1 days per decade since 1961.

3. Urban heat islands in Indian cities can be 2°C to 10°C hotter than their surrounding rural areas.

Which of the statements given above is/are correct?

Q3Data-centricMedium

According to the article, by how many days per decade has the maximum duration of heatwaves increased in India's Core Heatwave Zone since 1961?

Q4Application/ImpactMedium

What does the article identify as the 'dangerous instinct' in addressing urban heat, which paradoxically worsens the problem?

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