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VOL. I · EST. 11.2025 
SatyaDheesh
सत्याधीश
India's Ground Truth Record
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IMD warns of orange and yellow alerts as northeast monsoon begins October 15, 2026

GS3Economy · S&T · Environment · Security· Nuclear & new energy technology· Prelims·

Monsoon variability and climate change impacts: a GS3 and Science & Technology case study.

Why in news

The IMD Director warned of orange and yellow alerts as the northeast monsoon begins on October 15, 2026, following a 28% rainfall deficiency in Keralam during the southwest monsoon.

Background

The IMD issued alerts for districts including Pathanamthitta. Historical rainfall data for Keralam shows 1,026.3 mm in 2021 and 185 mm in 2016.

Facts for Prelims

  • FactKeralam's southwest monsoon was 28% deficient in 2026.
  • FactKeralam recorded 1,026.3 mm of rainfall in 2021.
  • FactKeralam recorded 185 mm of rainfall in 2016.
  • PlacePathanamthitta is a district in Keralam under IMD alerts.
  • S&TEl Niño and rising temperatures are identified as factors influencing rainfall intensity and cyclone formation.

Prelims practice question

With reference to the rainfall data and alerts in Keralam, consider the following statements:

  1. Keralam's southwest monsoon was 28% deficient in 2026.
  2. Pathanamthitta is a district in Keralam under IMD alerts.
  3. Keralam recorded 1,026.3 mm of rainfall in 2016.

Which of the statements given above is/are correct?

  1. (a)2 only
  2. (b)1 and 2 only
  3. (c)2 and 3 only
  4. (d)1, 2 and 3
Show answer

Answer: (b) 1 and 2 only — Statements 1 and 2 are correct. Statement 3 is incorrect: Keralam recorded 185 mm of rainfall in 2016.

For Mains

Q. Discuss the impact of climate change and El Niño on the variability of the Indian monsoon and its implications for agricultural planning.

Dimensions to cover in your answer

  • Climate variability: Correlation between rising global temperatures and increased frequency of extreme rainfall events
  • Agricultural risk: Impact of monsoon deficiency on crop yields and food security in coastal regions

Keywords: Monsoon variability · Climate change · El Niño · Meteorological alerts · Rainfall deficiency

Read the full news →Report a mistake in this noteHow notes are madeSource: The Hindu ↗Also: GS1 · Geophysical phenomena (earthquakes, cyclones, volcanoes)Also: GS3 · Climate change & international agreements

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