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Heatwave in Haryana

  • 16 May 2024
  • 2 min read

Why in News?

Recently, the India Meteorological Department (IMD) has issued a "yellow" and "orange" alert, signaling the likelihood of heatwave conditions in Haryana.

Key Points

  • Heatwaves are prolonged periods of excessively hot weather that can cause adverse impacts on human health, the environment, and the economy.
    • India, being a tropical country, is particularly vulnerable to heatwaves, which have become more frequent and intense in recent years.
  • Criteria for Declaring Heat Wave in India:
    • Plains and Hilly Regions:
      • Heat wave is considered if the maximum temperature of a station reaches at least 40°C or more for Plains and at least 30°C or more for Hilly regions.
      • Based on Departure from Normal Heat Wave: Departure from normal is 4.50°C to 6.40°C.
        • Severe Heat Wave: Departure from normal is >6.40°C.
      • Based on Actual Maximum Temperature Heat Wave: When actual maximum temperature ≥45°C.
        • Severe Heat Wave: When actual maximum temperature ≥47°C.
      • If the above criteria are met in at least 2 stations in a Meteorological subdivision for at least two consecutive days, it is declared so on the second day.
    • Coastal Areas:
      • When the maximum temperature departure is 4.50°C or more from normal, a heat wave may be described provided the actual maximum temperature is 37°C or more.
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