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April 3, 2026Journal of Water and Climate Change0 citationsOpen Access

Compounding Heat Waves and Extreme Precipitation Events in India

Compounding heat waves and extreme precipitation in India using event coincidence analysis

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Authors

SSSwarnendu SahaDSDivya SardanaAJAshish Manoj J

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Overview

Quantitative analysis shows increasing correlation of heat waves and heavy rainfall in India, indicating climate change effects.

Key Points

  • The study aims to quantify the relationship between heat waves and heavy rainfall in India from 1951 to 2020.
  • Utilized Event Coincidence Analysis to evaluate relationships between heat waves and rainfall events.
  • Calculated Precursor Coincidence Rate (PCR) and Trigger Coincidence Rate (TCR) for different time windows.
  • Conducted seasonal analysis to assess heat wave-rainfall coupling variations.
  • TCR declined for shorter intervals (ΔT = 2, 5) but increased by 50% for longer intervals (ΔT = 7) indicating more rainfall after heat waves.
  • PCR rose consistently, showing a rise from 13% to 27% of grid points experiencing heat waves before rainfall.
  • Stronger coupling between heat waves and rainfall observed in winter and pre-monsoon seasons, with high variability noted in recent decades.

Cite This Study

Saha et al. (2026) studied this question.

synapsesocial.com/papers/69cf5ebc5a333a821460d439https://doi.org/10.2166/wcc.2026.312
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